阅读下面材料,并解决问题:
内有一点P,若点P到顶点A、B、C的距离分别为3,4,5,求
的度数.为了解决本题,我们可以将
绕顶点A旋转到
处,此时
,这样就可以利用旋转变换,将三条线段
转化到一个三角形中,从而求出
;
(2)基本运用
请你利用第(1)题的解答思想方法,解答下面问题
已知如图②,
为
上的点且
,求证:
;
(3)能力提升
如图③,在
中,
,点O为
内一点,连接
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af51564ad769756ddda5ff0c7f07408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3e6df256ff2ea759572fb5cffe1463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef613539d5e569f11d33c1f46d03120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
(2)基本运用
请你利用第(1)题的解答思想方法,解答下面问题
已知如图②,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4064da7c5eab8e4daad217f9cd438a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3287f3654372fc20f43ab07eff5adfc1.png)
(3)能力提升
如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aac20df6ccaf9ddf7902e9ac39989aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6330ad126b6937ea61f25437ae9038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765ee49bfe09fed44327e8be2347dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62635ee088808196e070c44ba6c20fb.png)
18-19九年级·福建龙岩·期中 查看更多[49]
【全国百强校】福建省龙岩市第一中学2019届九年级(上)期中数学试题江西省九江市同文中学2018-2019学年初二下学期期中数学试卷江苏省南通市海门市2019-2020学年九年级上学期期中数学试题广东省阳江市部分学校联考2019-2020学年九年级上学期期中数学试题福建省漳州市平和县2018-2019学年八年级下学期期中数学试题(已下线)23.1 图形的旋转-2020-2021学年九年级数学上册高频易错题汇编(人教版)江苏省泰州市海陵区海军中学2020-2021学年九年级上学期期中数学试题广东省广州市白云区永平片2021-2022学年九年级上学期期中数学试题重庆市綦江区联盟校2022-2023学年九年级上学期期中数学试题浙江省金华市浦江县2022-2023学年九年级上学期10月月考数学试题(已下线)题型五 综合与实践 3(已下线)(培优特训)专项9.4 旋转常考综合运用-2022-2023学年八年级数学下册《同步考点解读·专题训练》(苏科版)(已下线)期中真题精选(常考60题专练)-2022-2023学年八年级数学下学期期中期末考点大串讲(北师大版) 江苏省泰州市姜堰区四校联考2022-2023学年八年级下学期第一次月考数学试卷 山东省菏泽市牡丹区牡丹区第二十一初级中学2022-2023学年八年级下学期6月月考数学试题江西省九江市永修县外国语学校2022-2023学年八年级下学期期中数学试题(已下线)专题01 与旋转有关的计算(30题)-【帮课堂】2023-2024学年九年级数学上册同步学与练(人教版)(已下线)专题03 旋转(知识串讲+热考题型+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(人教版)(已下线)专题03 圆的基本性质(知识串讲+热点考题+真题训练)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)陕西省西安市雁塔区西安市曲江第二中学2021-2022学年八年级下学期期中数学试题(已下线)第二十三章 旋转 能力提升卷(B卷)-2023-2024学年九年级数学上册《知识解读·题型专练》(人教版)山东省日照市新营中学2023-2024学年九年级上学期10月月考数学试题福建省福州立志中学2023-2024学年九年级上学期期中数学试题湖北省随州市广水市2023-2024学年九年级上学期期中数学试题辽宁省抚顺市新宾满族自治县2023-2024学年九年级上学期期中数学试题安徽芜湖第二十九中学2023-2024学年九年级期上学期中数学试题重庆市九龙坡区渝高中教育集团2023-2024学年九年级上学期期中数学试题湖北省随州市随县部分学校联考2023-2024学年九年级上学期期中数学试题山东省滨州市无棣县2023-2024学年九年级上学期期中数学试题安徽省芜湖市第四十三中学2023-2024学年九年级上学期期中数学试题江西省上饶市余干县2023-2024学年九年级上学期期中数学试题湖北省随州市曾都区八角楼初级中学2023-2024学年九年级上学期第二次月考数学试题(已下线)期中复习(易错50题23个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)广西壮族自治区南宁市西乡塘区第十八中学2023-2024学年九年级上学期期中数学试题(已下线)清单03旋转(12个考点梳理+题型解读+核心素养提升+中考聚焦)-2023-2024学年九年级数学上学期期末考点大串讲(人教版)(已下线)期末复习(易错45题21个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(浙教版)(已下线)期末复习(易错60题34考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(苏科版)(已下线)期末复习(易错48题28个考点)-2023-2024学年九年级数学上学期期中期末考点归纳满分攻略讲练(人教版)山东省淄博市高青县2023-2024学年八年级上学期期末数学试题山东省日照市东港区日照高新区中学2023-2024学年九年级上学期期末数学试题山东省淄博市张店区新元学校2023-2024学年八年级上学期12月月考数学试题(已下线)山东省东营市东营区东营区文华学校2023-2024学年八年级上学期12月月考数学试题江苏省泰州市靖江市滨江学校2023-2024学年八年级下学期3月月考数学试题(已下线)第03讲 图形的旋转(4个考点+4种题型+强化训练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(苏科版)广东省深圳市宝安区10校联考2023-2024学年八年级下学期期中数学试题(已下线)专题03 图形的平移与旋转(考题猜想,易错必刷30题9种题型专项训练)-2023-2024学年八年级数学下学期期末考点大串讲(北师大版)(已下线)第3章 图形的平移与旋转常考易错(10个考点40题专练)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(北师大版)(已下线)数学-2024年中考考前最后一课(7)(已下线)期末复习(易错题60题23个考点)-2023-2024学年八年级数学下学期期末考点大串讲(北师大版)
更新时间:2024-01-19 20:15:36
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】【观察猜想】(1)我们知道,正方形的四条边都相等,四个角都为直角.如图1,在正方形
中,点
,
分别在边
,
上,连接
,
,
,并延长
到点G,使
,连接
.若
,则
,
,
之间的数量关系为 ___________;
【类比探究】(2)如图2,当点E在线段
的延长线上,且
时,试探究
,
,
之间的数量关系,并说明理由;
【拓展应用】(3)如图3,在
中,
,D,E在
上,
,若
的面积为12,
,请直接写出
的面积.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e9f8f8598ffafaf6168f64799c8b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
【类比探究】(2)如图2,当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
【拓展应用】(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76805974fefbe166b90d260e822ab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436cc600f2cd2fd77a7823bc348537a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在四边形ABCD中,对角线AC、BD相交于点O,将△COD绕点O按逆时针方向旋转得到△C1OD1,旋转角为θ(0°<θ<90°),连接AC1、BD1,AC1与BD1交于点P.
![](https://img.xkw.com/dksih/QBM/2021/8/27/2795318575341568/2795743830917120/STEM/e653ee79d7104ad08ce3f59e5a911e3a.png?resizew=555)
(1)如图1,若四边形ABCD是正方形.请直接写出AC1与BD1的数量关系和位置关系.
(2)如图2,若四边形ABCD是菱形,AC=6,BD=8,判断AC1与BD1的数量关系和位置关系,并给出证明;
(3)如图3,若四边形ABCD是平行四边形,AC=6,BD=12,连接DD1,设AC1=kBD1,请直接写出k的值和AC12+(kDD1)2的值.
![](https://img.xkw.com/dksih/QBM/2021/8/27/2795318575341568/2795743830917120/STEM/e653ee79d7104ad08ce3f59e5a911e3a.png?resizew=555)
(1)如图1,若四边形ABCD是正方形.请直接写出AC1与BD1的数量关系和位置关系.
(2)如图2,若四边形ABCD是菱形,AC=6,BD=8,判断AC1与BD1的数量关系和位置关系,并给出证明;
(3)如图3,若四边形ABCD是平行四边形,AC=6,BD=12,连接DD1,设AC1=kBD1,请直接写出k的值和AC12+(kDD1)2的值.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,△ABD,△AEC 都是等边三角形
![](https://img.xkw.com/dksih/QBM/2019/10/2/2303477646409728/2303844663615488/STEM/0aa1692d711d456c85fb768b2fd52452.png?resizew=216)
(1)求证:BE=DC .
(2)设 BE、DC 交于 M,连 AM,求
的值.
![](https://img.xkw.com/dksih/QBM/2019/10/2/2303477646409728/2303844663615488/STEM/0aa1692d711d456c85fb768b2fd52452.png?resizew=216)
(1)求证:BE=DC .
(2)设 BE、DC 交于 M,连 AM,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088bb27993ab0af209156a38d9da7089.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】人教版数学八年级下册教材的数学活动一折纸,引起许多同学的兴趣,实践发现:对折矩形纸片
,使
与
重合,得到折痕
,把纸片展开;以
为折痕再一次折叠纸片,使点
落在折痕
上的点
处,把纸片展开;连接
.
(1)如图①,求
;
(2)如图②,折叠矩形纸片
,使点
落在
边上点
处,并且折痕交
边于点
,交
于点S,把纸片展开,连接
交
于点
,连接
.求证:四边形
是菱形;
(3)如图③,矩形纸片
,
,
,折叠纸片,使点A落在
边上点
处,并且折痕交
于点T,交
于点S,把纸片展平,请直接写出线段
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/de342b54-d9ad-452b-8def-37b0c5f0dd3c.png?resizew=623)
(1)如图①,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44abd5ae9cf51a1303fd2a03e4aac86e.png)
(2)如图②,折叠矩形纸片
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1ec05e3cec27677ded7b4aecaa62d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06b822b110f2c6cc77aa71d8ff1b23d.png)
(3)如图③,矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5c3ccd350ed8aad71fed37ea423b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1ec05e3cec27677ded7b4aecaa62d3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】问题提出:如图1所示,等边
内接于
,点P是
上的任意一点,连接
.线段
满足怎样的数量关系?
(1)尝试解决:为了解决这个问题,小明给出这种解题思路:由条件
,
,从而将
绕点C逆时针旋转
交PB延长线于点M,从而证明
,请你完成余下思考,并直接写出答案:
的数量关系是______;
(2)自主探索:如图2所示,把原问题中的“等边
”改成“正方形
”,其余条件不变,
①
与
有怎样的数量关系?请说明理由;
②
与
的数量关系是______.(直接写出结果)
(3)学以致用:如图3所示,在
中,
,
,
,连接
,以
为底作等腰直角三角形
,F是
边上的一点,连接
和
,且
,则
的长为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd31978f8811a3264f88b8fb2b6556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd31978f8811a3264f88b8fb2b6556d.png)
(1)尝试解决:为了解决这个问题,小明给出这种解题思路:由条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06429ef4079145b4596d7be2eb0e9214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd31978f8811a3264f88b8fb2b6556d.png)
(2)自主探索:如图2所示,把原问题中的“等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adaf2a29ffe39a22be97d9ee4c0a09a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dee1a1cf68677d143172a2a50709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adaf2a29ffe39a22be97d9ee4c0a09a.png)
(3)学以致用:如图3所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d2649a844e8619de4663a03c233f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c640f5d887fa078c4eab40deac81881d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68251f6ce06168cfb89fe164ecf104ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7188d4324b65f0a1c37e347fe10e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/58f742e9-b8d6-462a-87a0-eba49d284656.png?resizew=586)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】(1)【探究·发现】正方形的对角线长与它的周长及面积之间存在一定的数量关系.已知正方形
的对角线
长为
,则正方形
的周长为______,面积为______(都用含
的代数式表示).
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983441890869248/2984878587338752/STEM/96d5b6a7196f4770ab06158897cc6db6.png?resizew=531)
(2)【拓展·综合】如图1,若点
、
是某个正方形的两个对角顶点,则称
、
互为“正方形关联点”,这个正方形被称为
、
的“关联正方形”.
①在平面直角坐标系
中,点
是原点
的“正方形关联点”.若
,则
、
的“关联正方形”的周长是______;若点
在直线
上,则
、
的“关联正方形”面积的最小值是______.
②如图2,已知点
,点
在直线
上,正方形
是
、
的“关联正方形”,顶点
、
到直线
的距离分别记为
和
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983441890869248/2984878587338752/STEM/96d5b6a7196f4770ab06158897cc6db6.png?resizew=531)
(2)【拓展·综合】如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①在平面直角坐标系
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9a3ea5e76e165faeabfdbc9717c287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e34e19d5cdf6a25652d4614f638f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e0641dd2f945e3b3bda568db964cb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d4ab45e8e8f0084d8d90a4c1233d86.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
真题
【推荐2】如图,在
中,
,
为斜边
上一点,以
为直径作
,交
于
,
两点,连接
,
,
.
;
(2)若
,
,
,求
的长和
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abae25b31c7c698102a7ed36a9a40ae3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0c20f5995f9b410f18ff4f28ebf900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08f1021839b75b64af4f8979442ad16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d85634cf9ebba444dd483912a832b1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,点P在射线
的上方,
、
,点M是射线
上的动点(点M不与点A重合),现将点P绕点A按顺时针方向旋转
到点Q,将点M绕点P按逆时针方向旋转
到点N,连接
,作直线
.
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977750097313792/2978606505672704/STEM/8f0ac4fd-3efc-4653-b55f-9868f8a9725a.png?resizew=244)
(1)求证:
;
(2)直线
与以点P为圆心,
的长为半径的圆是否存在相切的情况?若存在,请求出此时
和
的关系,若不存在,请说明理由;
(3)若
,当以点P为圆心,
长为半径的圆经过点Q时,直接写出劣弧
与两条半径所围成的扇形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3916d425a2f666e4766546cdf959558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a283b78856e69fb756fb4ffcf92543c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977750097313792/2978606505672704/STEM/8f0ac4fd-3efc-4653-b55f-9868f8a9725a.png?resizew=244)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932867b48c9dc2cf998f73a96c482001.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885d65a776109a24981277b0f3e05b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f156c990df31740ae945bd61d52b8c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d1d93fde9dca78db40308469710534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】综合与实践
问题情境:
四边形
是边长为
的正方形,分别以
为边向正方形外侧构造两个等边三角形
和
.将
沿射线
平移得到
,点A、B、E的对应点分别为
、
、
,连接
,
.
(1)如图1,当点
位于
边上时,试判断四边形
的形状,并证明.
(2)如图2,当四边形
为矩形时,求
平移的距离.
(3)拓展创新:在(2)的条件下,将
绕点
顺时针旋转一定角度得到
,点
,
的对应点分别为
,
,连接
.当
时,请直接写出
的长.
问题情境:
四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646084b7f3902efa4c462ed67599265a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de353f7857ec9fc7f5f249faf0c1d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d30252720ff0a2b1f105523e9aa3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356d4349bc0500c3b20b57012a440658.png)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b1588b157a56460b28215c58a6bfa.png)
(2)如图2,当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b1588b157a56460b28215c58a6bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(3)拓展创新:在(2)的条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de353f7857ec9fc7f5f249faf0c1d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0b7f15845be7bf66749a9f91c08c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc21c1a453a13b9ad0c89589b6fcf7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】【操作发现】(1)如图①,在边长为1个单位长度的小正方形组成的网格中,
的三个顶点均在格点上.如果将
绕点A顺时针方向旋转
,点B的对应点为
,点C的对应点为
,连结
,此时
___________;
【问题解决】(2)在某次数学兴趣小组活动中,小宇和同学遇到了如下问题:如图②,在等边
中,点P在内部,且
,
.求
的长.
经过同学们的观察、分析、思考、交流、对上述问题形成了如下想法:将
绕点A按顺时针方向旋转
,得到
,连接
,寻找
三边之间的数量关系……请参考他们的想法,完成该问题的解答过程;
【学以致用】(3)如图③,在等边
中,
,点P在
内,
,
.求
的面积;
【思维拓展】(4)如图④,在四边形
中,
,垂足为E,
,
,
,
(k为常数),请直接写出
的长(用含k的式子表示).
![](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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e435d643780ed87871dcc27fadda45.png)
【问题解决】(2)在某次数学兴趣小组活动中,小宇和同学遇到了如下问题:如图②,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701f7045e9498aac56affa8d2da3d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61fb3b92bd08707aca2f3e31ae16a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
经过同学们的观察、分析、思考、交流、对上述问题形成了如下想法:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f8c0c8a16d9e56d7db6a9d8657faf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c7267e5313b9b00ef22c94a479fc34.png)
【学以致用】(3)如图③,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e39bee1445161f91213c83b498b8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a665ba024f2840ce5aef3765249341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b47e792146e2f7d93a9ef9ad1294ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
【思维拓展】(4)如图④,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab9a141223622f04b48993d7b32168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e24db47e37d968219b62b6a69712a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f93c1d089fb7f07c02e82e29184b4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/3e2909e6-4d57-448c-bfe4-bbcb55f5f971.png?resizew=624)
您最近一年使用:0次