1 . 如图,在
中,
,
平分
.小明在刚学完“三角形全等的判定”这节课后,想利用所学知识,推导出
和
面积的比值与
,
两边比值的关系.他的思路是:过点
作
的垂线,垂足为点
,再根据三角形全等来证明
和
的高相等,进一步得到
和
的面积之比等于
的两邻边边长之比.请根据小明的思路完成以下作图与填空:
作
的垂线,垂足为点
(保留作图痕迹,不写作法,要下结论).
(2)证明:∵
,
∴
.
∵
平分
,
∴ ① .
在
和
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e1b0e7fd9bb7a783cbab92778e57f8.png)
∴
.
∴
.
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee2df601b93d713fb6e7d173c50b0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0d440e8476117900bfbd3da14f449.png)
∴
③
小明再进一步研究发现,只要一个三角形被其任意一内角角平分线分为两个三角形,均有此结论.请你依照题意完成下面命题:如果一个三角形满足被其任意一内角角平分线分为两个三角形,那么 ④ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(2)证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10809d172017faa4b3bf06c8a61a5c9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cec3a23decb7843424861abf70eeb29.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
∴ ① .
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b058127bcbfeb831be0f45ee34554066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e1b0e7fd9bb7a783cbab92778e57f8.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea4c12dfb76310f5b021d9ced09f1ed.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e803780fc678e4121636018760f6e4e1.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee2df601b93d713fb6e7d173c50b0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0d440e8476117900bfbd3da14f449.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4025aca197b1d78955435ce5016d899f.png)
小明再进一步研究发现,只要一个三角形被其任意一内角角平分线分为两个三角形,均有此结论.请你依照题意完成下面命题:如果一个三角形满足被其任意一内角角平分线分为两个三角形,那么 ④ .
您最近一年使用:0次
2 . 如图,用尺规作图完成下列作图步骤:
①以点O为圆心,以任意长为半径画弧,分别交射线
、
于点C、D;
②以点B为圆心,以
长为半径画
,交射线
于点
,点F与点C在
的异侧);
③以点E为圆心,以
长为半径画
,交
于点N,作射线
即可得到
,连接
、
.
则下列说法中错误的是( )
①以点O为圆心,以任意长为半径画弧,分别交射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
②以点B为圆心,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e124a392dc84fcc1662fe6d896aa12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
③以点E为圆心,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae728c7be0f0cf78711f3fa5ccccf30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e124a392dc84fcc1662fe6d896aa12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a451cb797e725e25bf36a8083b963c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
则下列说法中错误的是( )
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
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3 . 如图,在
中,
,
,点
在
边上,且
.
的度数;
(2)尺规作图:作
的平分线,交
于点
,连接
;(保留作图痕迹,不要求写作法)
(3)在(2)的条件下,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9666188e21ea5c4b24d5248e87dc7463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)在(2)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
您最近一年使用:0次
4 . 如图,一次函数
与反比例函数
的图象于点
,B为y轴正半轴一点,连接
.
(1)求反比例函数的表达式.
(2)尺规作图:作线段
的中点C.(保留作图痕迹,不写做法)
(3)连接
并延长至点D,使
,连接
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70264d1ff887edfe22ebc6fa518446b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9940526785ca763da2dfa35e77c934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28940af3d062c71a026f161455859312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/236925d9-0672-4b04-b368-2b3fb1d4c09d.png?resizew=145)
(1)求反比例函数的表达式.
(2)尺规作图:作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f660de9a0df3283b166d9489811451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6196000474aaadf776220c51d4ac2a9b.png)
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2024-04-03更新
|
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|
4卷引用:河南省驻马店市驿城区第四中学2023-2024学年九年级下学期3月月考数学试题
河南省驻马店市驿城区第四中学2023-2024学年九年级下学期3月月考数学试题2023-2024学年河南省三甲名校原创押题模拟预测题(二)数学广东省湛江市雷州市第八中学2023-2024学年九年级下学期月考数学试题(已下线)专题11.16 反比例函数(全章分层练习)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)
名校
5 . 如图,
是菱形
的对角线.
的垂直平分线,分别与
,
交于点E,F,连接
、
(尺规作图,不写作法,保留作图痕迹);
(2)求证:点F在线段
的垂直平分线上.
证明:
四边形
是菱形
,
,
,
① ,
,
,
在
和
中,
,
,
② .
垂直平分
,
③ ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b0bb70bb72de8d7b4a3e1b69d5dda9.png)
点
在线段
的垂直平分线上( ④ ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
(2)求证:点F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b87a633fdbe9e58764d922628aa063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7305de9211785b826823153897b17517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d67221867a6ea8593dda7b1806e684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bd3d9d7db371039d5dc4309950a8ed.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dbd5cf50d051d8c7946aee159da928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd4d462a390c996b40c309333c73d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173f7d26d069c0f16a0f6fcb517aa28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b0bb70bb72de8d7b4a3e1b69d5dda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2024-03-12更新
|
247次组卷
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4卷引用:重庆市沙坪坝区第八中学校2023-2024学年九年级上学期第六次作业数学试题
重庆市沙坪坝区第八中学校2023-2024学年九年级上学期第六次作业数学试题重庆市部分学校2023-2024学年九年级下学期阶段测试数学试题2024年重庆市中考数学二模模拟试题(已下线)中考重点01 尺规作图+补全证明过程(5题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)
6 . 如图,
是等边三角形,点
分别在
上,
与
相交于点
.
;
(2)在线段
的延长线上求作一点P,使得
.(要求:尺规作图,保留作图痕迹)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebac98bc0eb0ee0dfc17d90cb2dbda1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9ac483e4c87ee716597262e99e95c4.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60faf3a9bc2daab1f386ec116d74b703.png)
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2024-01-30更新
|
77次组卷
|
2卷引用:2024年河南省信阳市潢川县中考二模数学试题
7 . 如图,平面直角坐标系中,反比例函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe3a78950f6a4bb479c7ec0d8e57b5b.png)
经过点
,过点
作
轴,垂足为
,连接
.
(2)①作
的垂直平分线,垂足为点
,交反比例函数图象于点
,交
于点
,交
轴于点
,并求点
的坐标
尺规作图,不写作法,保留作图痕迹
;
②求证∶
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe3a78950f6a4bb479c7ec0d8e57b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56339a78e814bc0cb8f45cb2e23515bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05208a740627fac02220fd11c135d172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
(2)①作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e37b122a7273e1251ea3860e74c896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f8bcf2218cfa3239a1716578d6ff50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb49c7a82ce0257232b47b0b55f570e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
②求证∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7d81f375b0c357f2b18296d5060347.png)
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8 . 如图,点
在线段
上,
,
,
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/40a1436c-17d5-47a3-8def-7e620473081a.png?resizew=193)
(1)尺规作图:过点
作线段
的垂线交
于点
.
基本作图,保留作图痕迹,不写作法,不下结论)
(2)求证
.
证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef3222a962b0a3b9bb1f4574b41bd79.png)
在
和
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f3b470a6f8631c3d6076a16ce3b133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbd95e0d1e6df9b0305d432b891202a.png)
, ,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3004bedb8f13b0450b70b552888152cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c1822554e70f431c909ceab11a50c3.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef3222a962b0a3b9bb1f4574b41bd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad8724e1ce5c37b7134f34c054569e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1b0a6ae241cd8cf208e71fa807c16f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/40a1436c-17d5-47a3-8def-7e620473081a.png?resizew=193)
(1)尺规作图:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4184755fedbf1f52d502c954d3d19f23.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef3222a962b0a3b9bb1f4574b41bd79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a783e5ffcf7a4ea9e531ea76199487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17fe30d57340c823f3aaa8734fc38d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f3b470a6f8631c3d6076a16ce3b133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbd95e0d1e6df9b0305d432b891202a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c77ae16a5391644ed0e690f61814d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4f113d067e83501aa20c4e893d0040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3004bedb8f13b0450b70b552888152cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c1822554e70f431c909ceab11a50c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db7b0229d9df87bc330413335fdc356.png)
您最近一年使用:0次
9 . 如图,已知正方形,点
在边
上,连接
.
(1)尺规作图:在正方形内部作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7316430d26a6f4bcc0bdadfd1a5330a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95020f773f8a4af2eee7912638284140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)要探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
解:,
,理由如下.
四边形
是正方形,
∴ ① ,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aebec09c6d958ff81c1cec7ca6fc3e1.png)
在和
中,
,
∴,
∴ ③
∵,
,
∴ ④ .
∴,
∴.
∴,
.
通过上面的操作,进一步探究得到这样的结论:两端点在正方形的一组对边上且 ⑤ 的线段长相等.
您最近一年使用:0次
10 . 如图,
是菱形
的对角线.
的垂直平分线,分别与
,
交于点E,F,连接
、
(尺规作图,不写作法,保留作图痕迹);
(2)求证:点F在线段
的垂直平分线上.
证明:
四边形
是菱形,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
, .
在
和
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dbd5cf50d051d8c7946aee159da928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
垂直平分
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
.
点F在线段
的垂直平分线上( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
(2)求证:点F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7305de9211785b826823153897b17517.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dbd5cf50d051d8c7946aee159da928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9a73fb3f4f7afe36f9f28c2e51f7d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040bece4d468e2353832b1cbe35d9dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次