在
中,
,
为
延长线上一点,点
为线段
,
的垂直平分线的交点,连接
,
,
.
时,则
______°;
(2)当
时,
①如图2,连接
,判断
的形状,并证明;
②如图3,直线
与
交于点
,满足
.
为直线
上一动点.当
的值最大时,用等式表示
,
与
之间的数量关系为______,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10ad623f3a05ecdc27b3f3e0169669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2ef38925946da1145a68651da67da9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
①如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
②如图3,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4aca16e0d54ce693cdc494636598b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3168c02d6206627d5b4385e57bd15636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
21-22八年级上·北京海淀·期末 查看更多[17]
北京市海淀区2021-2022学年八年级上学期期末数学试题(已下线)北京市第四中学2021-2022学年九年级下学期数学开学测试试题(已下线)(山东青岛卷)2022年中考数学第二次模拟考试(已下线)专题12.25 三角形全等几何模型-手拉手模型(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)广东省梅州市丰顺县汤坑镇第二中学2022—2023学年九年级上学期开学考试数学试卷(已下线)专题2.2 最值模型之将军饮马 专项讲练-2022-2023学年八年级数学上册重难题型全归纳及技巧提升专项精练(浙教版)(已下线)专题1.52 全等三角形几何模型-手拉手模型(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(浙教版)新疆维吾尔自治区乌鲁木齐市天山区第十三中学2022-2023学年八年级上学期期末数学试题河北省保定市易县2022-2023学年八年级上学期期末考试数学试题(已下线)1.3 线段的垂直平分线-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(北师大版)(已下线)黄金卷5-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(包头专用)(已下线)专题12.25 全等三角形几何模型(手拉手)(分层练习)(培优练)-2023-2024学年八年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题1.25 全等三角形几何模型(手拉手)(分层练习)(培优练)-2023-2024学年八年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题04 全等三角形模型训练(6类经典模型+优选提升)-【好题汇编】备战2023-2024学年八年级数学上学期期中真题分类汇编(人教版)(已下线)12.4(培优课)全等中的手拉手模型(题型精讲精练)-【题型分类精粹】2023-2024学年八年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)广东省清远市英德市2023-2024学年八年级下学期期中数学试题(已下线)专题08 最值问题(代数最值+几何最值)(5大题型)【好题汇编】-备战2023-2024学年七年级数学下学期期末真题分类汇编(陕西专用)
更新时间:2023-01-30 20:37:14
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图将
沿线段
翻折至
处,延长
、
(点F在
内部).
(1)请直接写出
、
与
的数量关系为__________;
(2)若
平分
,
平分
.点F在
内部(如图②),证明:
.
(3)若射线
、
分别是
,
的n等分线(n为大于2的正整数),即
,
,射线
和射线
相交于点O.请直接写出
与
的数量关系:__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a0c85deb80d8e63bc60127e803f7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37b078d02601f76f0f8320b410809f.png)
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1a13346c7971d064ef14cecd9a9ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4219a901f68ffecbd8ae9b9567ce524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905252daf3fde1ee3ba1464c1cc9bc68.png)
(3)若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1a13346c7971d064ef14cecd9a9ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f5d6b66938af72fcab8d450db8e6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa85580065b12da3b96b302b33911b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】【问题初探】
(1)在张老师的课堂上,正引导学生证明“三角形内角和定理”,如图1,已知:
.求证:
,结合之前拼摆的实践操作经验,学生们多用于下列两种证明思路:
①如图2,延长
到
,过点
作射线
,相当于把
,
都移到了顶点
的位置,利用图形特点获得
,
,
的数量关系;
②如图3,过点
作直线
,相当于把
,
都移到了顶点
的位䈯,再利用图形特点获得
,
,
的数量关系;
请你选择上述的一种证明思路,并写出证明过程.
【类比分析】
(2)在回顾解题思路时,张老师带领同学们重点总结了转化思想,两种解题思路都利用了“平行线”的等角转化的功能;为了帮助学生更好地感悟转化思想,将图3进行了变换并提出了下面问题,请你解答.
如图4,已知
,过点
作直线
,
为线段
上一点,连接
,
,若
,
,
,求
的度数.
【学以致用】
(3)如图5,
,
,
,若
,
,
,请你判断
,
,
三者之间的数量关系,并证明你的结论.
(1)在张老师的课堂上,正引导学生证明“三角形内角和定理”,如图1,已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791e819abbe4ecc6f2e7209839c4fc0b.png)
①如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea70178f34595abab1a383326c74d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
②如图3,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7b5caf93535240f8e073fd0a2bcff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
请你选择上述的一种证明思路,并写出证明过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/b89d6500-24fa-4bed-8aba-292fc3554fbe.png?resizew=379)
【类比分析】
(2)在回顾解题思路时,张老师带领同学们重点总结了转化思想,两种解题思路都利用了“平行线”的等角转化的功能;为了帮助学生更好地感悟转化思想,将图3进行了变换并提出了下面问题,请你解答.
如图4,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7b5caf93535240f8e073fd0a2bcff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe1a6ce0b35896c8a1c687a4376e71f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66eec809b500cb5dda09be178bdf4ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f184b7ca3a71739408e078670aa22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093b40702557d7291c5dea9dccccea2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7deac829e20432ffdce1919b3e13e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c478d6dea51f33674c9ec39a00e783b.png)
【学以致用】
(3)如图5,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ee3aefffa15b9148f07c9c1dc73250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c91d7433312ae63780eb67d4079071e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3841a37cf57bf05520b69c0cbbb8141b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc45fc94fbe621bc2aa8afa56b9731e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406a2d99e3ca070902c5695f9d4f32c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1318b44ce8675d6c2b7708a5b3c5a5de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/2390a3bb-1c75-4585-8e9f-de02ee1a887a.png?resizew=272)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
解题方法
【推荐3】在学习全等三角形知识时,数学兴趣小组发现这样一个模型:模型是由两个顶角相等且有公共顶角顶点的等腰三角形组成的图形,如果把它们的底角顶点连接起来,则在相对位置变化的过程中,始终存在一对全等三角形,我们把这种模型称为“手拉手模型”.这个数学兴趣小组进行了如下操作:
(1)如图1.在△ABC和△ADE中,AB=AC,AD=AE,∠BAC=∠DAE=40°(AB>AD),连接BD,CE,当点E落在AB边上,且D,E,C三点共线时,则在这个“手拉手模型”中,和△ABD全等的三角形是 ,∠BDC的度数为 .
(2)如图2.在△ABC和△ADE中,AB=AC,AD=AE,∠BAC=∠DAE=90°,连接BD,CE,当点B,D,E在同一条直线上时,请判断线段BD和CE的关系,并说明理由.
(3)如图3,已知△ABC,请画出图形:以AB,AC为边分别向△ABC外作等边三角形ABD和等边三角形ACE(等边三角形三条边相等,三个角都等于60°),连接BE,CD,交于点P,请直接写出线段BE和CD的数量关系及∠BPD的度数.
![](https://img.xkw.com/dksih/QBM/2021/8/6/2780454243868672/2781628447219712/STEM/97f12fc9-761c-41cf-aed0-d5e97033c87a.png)
![](https://img.xkw.com/dksih/QBM/2021/8/6/2780454243868672/2781628447219712/STEM/7966008d-aab2-46b3-b1d8-70d7768c13b7.png)
(1)如图1.在△ABC和△ADE中,AB=AC,AD=AE,∠BAC=∠DAE=40°(AB>AD),连接BD,CE,当点E落在AB边上,且D,E,C三点共线时,则在这个“手拉手模型”中,和△ABD全等的三角形是 ,∠BDC的度数为 .
(2)如图2.在△ABC和△ADE中,AB=AC,AD=AE,∠BAC=∠DAE=90°,连接BD,CE,当点B,D,E在同一条直线上时,请判断线段BD和CE的关系,并说明理由.
(3)如图3,已知△ABC,请画出图形:以AB,AC为边分别向△ABC外作等边三角形ABD和等边三角形ACE(等边三角形三条边相等,三个角都等于60°),连接BE,CD,交于点P,请直接写出线段BE和CD的数量关系及∠BPD的度数.
![](https://img.xkw.com/dksih/QBM/2021/8/6/2780454243868672/2781628447219712/STEM/97f12fc9-761c-41cf-aed0-d5e97033c87a.png)
![](https://img.xkw.com/dksih/QBM/2021/8/6/2780454243868672/2781628447219712/STEM/7966008d-aab2-46b3-b1d8-70d7768c13b7.png)
![](https://img.xkw.com/dksih/QBM/2021/8/6/2780454243868672/2781628447219712/STEM/f1994f14-bedf-4ff0-8ca2-6b7299e86c41.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系
中,点
,
分别在线段
,
上,如果存在点
使得
,
(
,
,
逆时针排列),则称点
是线段
的“关联点”如图
,点
是线
的“关联点”.
(1)如图
已知点
,
,点
与点
重合.
当点
是线段
中点时,在
,
中,其中是线段
的“关联点”的是 ;
已知点
是线段
的“关联点”,则点
的坐标是 .
(2)如图
,已知
,
.
当点
与点
重合,点
在线段
上运动时(点
不与点
重合),若点
是线段
的“关联点”,求证:
:
当点
,
分别在线段
,
上运动时,直接写出线段
的“关联点”
形成的区域的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7c22cd532a109aa9765393d0412837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f2b4365497247dd56efee5a7d50800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/120ea01d-b096-4836-8862-46d261f3292f.png?resizew=529)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f943121691740928470268b34781e06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b497de997ad2f1300d5054660c58c6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e09170c03437e5cb4cb5557bc878ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e916256bee04715c91f6d7f102ec19d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28aadfab3facdc491d715d95027c0b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb050884d86a19bb016b92e76f5bcbeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c27cb23ae71a8728e2e0895f856f4b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐2】阅读理解:如图
,在四边形
的边
上任取一点
点
不与
重合
,分别连接
、
,可以把四边形
分成三个三角形,如果其中有两个三角形相似,我们就把
叫做四边形
的边
上的“相似点”;如果这三个三角形都相似,我们就把
叫做四边形
的边
上的“强相似点”
解决问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/997028a1-8002-49c4-acf9-527659bf11e7.png?resizew=473)
(1)如图
,
,试判断点
是否是四边形
的边
上的相似点,并说明理由;
(2)如图
,在矩形
中,
、
、
、
四点均在正方形网格
网格中每个小正方形的边长为
的格点
即每个小正方形的顶点
上,试在图
中画出矩形
的边
上的强相似点;
(3)如图
,将矩形
沿
折叠,使点
落在
边上的点
处,若点
恰好是四边形
的边
上的一个强相似点,请求出
:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8a65fcb0beeca45f72f11e23a1d182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/997028a1-8002-49c4-acf9-527659bf11e7.png?resizew=473)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890512d688ac847f3c8cd7de799937b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdcf8a317ccc87a1bf8e17852fddbe29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图①,在等腰直角三角形
中,
,作
平分
交
于点
,点
为射线
上一点,以点
为旋转中心将线段
逆时针旋转90°得到线段
,连接
交射线
于点
,连接
、
.
填空:
(1)①线段
、
的数量关系为 .
②线段
、
的位置关系为 .
推广:
(2)如图②,在等腰三角形
中,顶角
,作
平分
交
于点
,点
为
外部射线
上一点,以点
为旋转中心将线段
逆时针旋转
度得到线段
,连接
、
、
.请判断(1)中的结论是否成立,并说明理由.
应用:
(3)如图③,在等边三角形
中,
.作
平分
交
于点
,点
为射线
上一点,以点
为旋转中心将线段
逆时针旋转
得到线段
,连接
交射线
于点
,当
时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
填空:
(1)①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
推广:
(2)如图②,在等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84803ef9e071f91da4a24a8ff12a3807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
应用:
(3)如图③,在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321674c90bb3c8f215d4ff9ad170f58f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图,等腰三角形
中,
,
平分
.点E为
上的动点,点M为
上的动点,连接
,将
沿
翻折.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/a630c8df-c503-4787-8f76-4af4be6bb772.png?resizew=334)
(1)图1沿
折叠,点A与点C重合,连接
,若
,①求证
;②
的度数为_________度;
(2)如图2,若点M和点B重合,连接
,将
沿
折叠得到
,且
,设
与
相交于点F.求
度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e323c08b18488d11bd8f3cd74efa971a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/a630c8df-c503-4787-8f76-4af4be6bb772.png?resizew=334)
(1)图1沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a65e7589ff3e31afb24713a8bd8159d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b47a08a25693bbfa01026573625ad15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)如图2,若点M和点B重合,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6accdd9b317c922d335e44911df357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77282d5b97a60264cf15fb74b48e4b59.png)
您最近一年使用:0次
【推荐2】在
中,D,E分别是
两边的中点,如果
上的所有点都在
的内部或边上,则
称为
的中内弧.例如,图1中
是
的一条中内弧.
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621407560523776/2681085975773184/STEM/2ac4e919-458a-4d7b-98dd-89a1d5fdfa59.png?resizew=337)
(1)如图2,
中,
,
,D,E分别是
,
的中点,画出
的最长的中内弧
,求此时
的长;
(2)在平面直角坐标系中,已知点
,
,
(
),在
中,D,E分别是
,
的中点.
①若
,求
的中内弧所在圆的圆心P的纵坐标的取值范围;
②若在
中存在一条中内弧,使得所在圆的圆心P在
的内部或边上,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621407560523776/2681085975773184/STEM/2ac4e919-458a-4d7b-98dd-89a1d5fdfa59.png?resizew=337)
(1)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284a563413dc0532138fb2a64db8cc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
(2)在平面直角坐标系中,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f803555762da5d9a9795cc5fad5b753e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87baa7770b063bfe7cd8f8fce57d9181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc43ea8cab6c642a943fd2443e98b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
②若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】(1)问题背景:如图1,在
与
中,AB=AC,AD=AE,
,求证:BD=CE.
(2)尝试运用:如图2,在等边
中,P是
外的一点,
,BP=9,
,求CP的长度.
(3)拓展创新:如图3,在
中,若AB=AC=16,
,O是BC的中点,点E是
内部一点,
,将线段AE绕点A逆时针旋转
得到AF,连接AF,请直接写出当OF的长度最小时,AE的长度为_________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bc5547bb6d2a7a315962ff75f6ba8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
(2)尝试运用:如图2,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe8cd113754bd9455f8d40d0a76408d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4775eb97d296048272d85829ea6474b3.png)
(3)拓展创新:如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9ab097e07de915f138fc14ee29ef88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/5a308afd-b55d-4a6b-9f9d-c5127cb933d2.png?resizew=615)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】(1)【问题情景】如图1,已知在正方形
中,点E、F分别是边
、
上的一动点,连接
、
,且
,如图,延长
至G,使
,通过证明
和
可得
,即:
.
(2)【尝试探究】如图2,当点E、F分别在射线
、
上运动,
时,探究
、
、
之间的数量关系,请说明理由;
(3)【模型建立】如图3,若将直角三角形
沿斜边翻折得到
,且
,点E、F分别在边
、
上运动,且
,试猜想(1)中的结论还成立吗?请加以说明;
(4)【拓展应用】如图4,已知
是边长为5的等边三角形,点D是
外一点,连接
、
,且
,
,以D为顶点作一个
角,使其角的两边分别交边
、
于点E、F,连接
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e9f8f8598ffafaf6168f64799c8b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa75e795d4f39357e5807a63b248bb14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4d2d2babe63c166f0e1e9b11e65452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e9f698052b80f6d75c8abdd5262ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24dfa37067ff455888ebe076eeb1fb2.png)
(2)【尝试探究】如图2,当点E、F分别在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
(3)【模型建立】如图3,若将直角三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6aef04eceb608a7a2cfc3e566f9e8b.png)
(4)【拓展应用】如图4,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfac9ab1dc776c9ec076ab2a132fcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
您最近一年使用:0次