(1)如图1,正方形
和正方形
(其中
),连接
交于点H,请直接写出线段
与
的数量关系 ,位置关系 ;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/eca78944-cf8e-4c01-8290-2b22a3e43bc8.png?resizew=174)
(2)如图2,矩形
和矩形
,
,将矩形
绕点D逆时针旋转
,连接
交于点H,(1)中线段关系还成立吗?若成立,请写出理由;若不成立,请写出线段
的数量关系和位置关系,并说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/b4ab4e05-3a21-43e5-8759-1935bbf574f5.png?resizew=178)
(3)矩形
和矩形
,
,将矩形
绕点D逆时针旋转
,直线
交于点H,当点E与点H重合时,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fc1c40b44ebe78dcd9516fac7bc5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4898c9c2901e68c47f8039b10194f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/eca78944-cf8e-4c01-8290-2b22a3e43bc8.png?resizew=174)
(2)如图2,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/121840c3453a108f1122d3fce3ec9a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109ecdaac28f57484db0ff408ed02ee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ae1a2d6999ababbd4b7905e4ae9376.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/b4ab4e05-3a21-43e5-8759-1935bbf574f5.png?resizew=178)
(3)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1195f3f16c756cea55c511e173484a03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109ecdaac28f57484db0ff408ed02ee8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
20-21九年级上·辽宁沈阳·期末 查看更多[25]
辽宁省沈阳市大东区2020-2021学年九年级上学期期末数学试题2021年福建省龙岩市漳平市部分学校中考数学第一次适应性试卷(一)2021年山东省济宁市泗水县三校联考中考数学一模试题2021年天津市河西区中考数学模拟试题(已下线)必刷卷03-2021年中考数学考前信息必刷卷【山东济南专用】江苏省苏州市常熟市常熟实验2020-2021学年八年级下学期5月月考数学考试2021年湖南省长沙市北雅中学九年级中考二模考试数学试题2021年山东省东营市广饶县九校联考中考数学二模试卷河南省漯河市第三中学2021-2022学年九年级上学期期末数学试题辽宁省盘锦市第一完全中学2021-2022学年九年级上学期期末数学试题2023年辽宁省营口实验中学等学校中考一模数学试题广西壮族自治区百色市第四中学2022-2023学年八年级下学期期中数学试题广东省广州市增城区春晖学校2022-2023学年七年级下学期期中数学试题广东省汕头市金平区金信中学2022-2023学年八年级下学期期中数学试题2023年安徽省定远重点中学初中部中考三模数学试题2023年广东省深圳市龙岗区塘坑学校中考一模数学试题2023年广东省深圳市龙岗区培新学校中考一模数学试题2023年广东省深圳市龙岗区丰丽学校中考一模数学试题(已下线)专题14 四边形综合题(针对20、22、23题) -学易金卷:五年(2019-2023)中考1年模拟数学真题分项汇编(安徽专用)(已下线)2023年深圳东莞一模(几何综合)(已下线)2023年湖北省黄冈市中考数学真题变式题21-24题湖北省荆州市沙市区第十一中学2022-2023学年九年级上学期期中模拟数学试题四川省内江市市中区内江市第六中学2023-2024学年九年级上学期期中数学试题2023年山东省东营市中考数学模拟预测题(5月份)山东省东营市胜利第一初级中学2023-2024学年九年级下学期3月月考数学试题
更新时间:2023-06-17 19:22:46
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【推荐1】问题提出
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/38c13409-a5ef-4102-b232-b6234a0cb9ac.png?resizew=515)
(1)如图①,点
是半径为1的
上任意一点,点
为
外一点,且
,则线段
的最小值为______;
问题探究
(2)如图②,在矩形
中,已知
,
,点
是
边上一动点(点
不与
,
重合),连接
,作点
关于直线
的对称点
,求线段
的最小值;
问题解决
(3)如图③,在正方形
中,
,动点
,
分别在边
,
上移动,且满足
,
交
于点
,连接
,求线段
的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/38c13409-a5ef-4102-b232-b6234a0cb9ac.png?resizew=515)
(1)如图①,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
问题探究
(2)如图②,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
问题解决
(3)如图③,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1db2c0955e5a5be47faf855bca738a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
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【推荐2】已知:如图,AB是半圆O的直径,弦CD∥AB,动点P、Q分别在线段OC、CD上,且DQ=OP,AP的延长线与射线OQ相交于点E、与弦CD相交于点F(点F与点C、D不重合),AB=20,cos ∠AOC=
.设OP=x,△CPF的面积为y.
(1)求证:AP=OQ;
(2)求y关于x的函数关系式,并写出x的取值范围;
(3)当△OPE是直角三角形时,求线段OP的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
(1)求证:AP=OQ;
(2)求y关于x的函数关系式,并写出x的取值范围;
(3)当△OPE是直角三角形时,求线段OP的长.
![](https://img.xkw.com/dksih/QBM/2019/2/21/2145434441695232/2145575226556416/STEM/7b2ceec364824fb69334987f3bf1c04f.png?resizew=212)
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解答题-作图题
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【推荐1】【数学初探】
在数学课上,叶老师提出了一个探究型问题:“如图1,你能借助锐角
画出一个菱形,使
为该菱形的一个内角吗?”雷同学提出了自己的见解:如图2,①作
的平分线AE,交BC于点E;②作AE的中垂线l分别交AB、AC、AE于点F、G、H;③连接EF,EG,则四边形AFEG是菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/5d334446-20d7-4278-83dd-8c678dd64d29.png?resizew=717)
(1)请你帮助雷同学证明四边形AFEG是菱形.
【深入探究】
雷同学开启大胆尝试,如图3,将
的中线BO延长至点D,使
,连接AD,CD,平移图2中的直线l(平移过程中直线l与AB、AC、AE的交点仍为F、G、H),当直线l恰好经过点D时,他通过测量发现了线段OG与线段BF存在特定的数量关系.
(2)请你写出线段OG与线段BF的数量关系,并小心求证.
【迁移应用】
(3)如图4,在(2)的条件下,若
,且
时,求
的值.
在数学课上,叶老师提出了一个探究型问题:“如图1,你能借助锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/5d334446-20d7-4278-83dd-8c678dd64d29.png?resizew=717)
(1)请你帮助雷同学证明四边形AFEG是菱形.
【深入探究】
雷同学开启大胆尝试,如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb36acf47d3a3d3f3b28bc9b118af53.png)
(2)请你写出线段OG与线段BF的数量关系,并小心求证.
【迁移应用】
(3)如图4,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e699a8e4376f1822eca1e85857f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d1be9b1e742b25e355af14502549cb.png)
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【推荐2】【问题情境】
在一次数学兴趣小组活动中,小明同学将一大一小两个三角板按照如图
所示的方式摆放.其中
,
,
.
【问题探究】
小明同学将三角板
绕点
按顺时针方向旋转.
(1)如图
,当点
落在边
上时,延长
交
于点
,求
的长;
(2)若点
、
、
在同一条直线上,求点
到直线
的距离;
(3)连接
,取
的中点
,三角板
由初始位置(图
),旋转到点
、
、
首次在同一条直线上(如图
),求点
所经过的路径长;
(4)如图
,
为
的中点,则在旋转过程中,点
到直线
的距离的最大值是 .
在一次数学兴趣小组活动中,小明同学将一大一小两个三角板按照如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74db1f028c135803c5f56852ec330d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fef865457af4bddbb5093135c67242b.png)
【问题探究】
小明同学将三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/a0da9150-8a41-464b-a4b5-f4d4a496062f.jpg?resizew=423)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/c220df14-6781-471c-ae01-f28ca46e443b.jpg?resizew=403)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab8a10e675354fa0c6e7da3d06b999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(4)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐3】定义:若连结三角形一个顶点和对边上一点的线段能把该三角形分成一个等腰三角形和一个直角三角形,我们称这条线段为该三角形的智慧线,这个三角形叫做智慧三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/2f91097e-3ac0-4f48-ac64-d785470841d4.png?resizew=436)
(1)如图1,在智慧三角形
中,
,
为该三角形的智慧线,
,
,则
长为________,
的度数为________.
(2)如图2,
为等腰直角三角形,
,F是斜边
延长线上一点,连结
,以
为直角边作等腰直角三角形
(点
按顺时针排列),
,
交
于点D,连结
,
,当
时,求证:
是
的智慧线.
(3)如图3,
中,
,
,若
是智慧三角形,且
为智慧线,求
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/2f91097e-3ac0-4f48-ac64-d785470841d4.png?resizew=436)
(1)如图1,在智慧三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2f1b2622fca870a8db62118900b77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce855315059cc0627baef5816aac1de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cec68a1111227d3b2aa12b291dc8216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21002725043bdace95b3244d4c75dd74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e164da95f6b74b65498e64ddb46267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6818a98204f62c1b16699d26ca0c3f62.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8817091d0f4b7d7ac6df560cb63c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e23cc5f129d32ea76b55a9cd1e86e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,在
中,
,点
是
边的中点,点
在
边上,
经过点
且与
边相切于点
,
.
是
的切线;
(2)若
,
,求
的半径
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/35002f8729aed9bd5dac784db33ea975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a81e3eb5321addeec7c952c95106db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,
是
的直径,弦
于点
,已知
,
,点
为
上任意一点,(点
不与
、
重合),连结
并延长与
交于点
,连结
、
、
.
(1)求
的长.
(2)若
,直接写出
的长.
(3)①若点
在
,
之间(点
不与点
重合),求证:
.
②若点
在
,
之间(点
不与点
重合),求
与
满足的关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979d5406af7e951f386dbb55a9617eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/28/c616cc6e-caf0-439c-919f-6082e07ccf87.png?resizew=145)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f78122f67bc7ec8382c3c93effb00a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(3)①若点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2232ed0cf72d7aedb671aa7a2cd5fe.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c562f35d37deaa855e69d6616a6dc801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5188fe411a739497927e65b1da478cc8.png)
您最近一年使用:0次