1 . 如图1,
是
的切线,切点为点
,连接
交
于点
,点
是优弧
上一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/610b2c88-4c84-4d7a-9040-276cfa14d363.jpg?resizew=359)
(1)求证:
;
(2)如图2,若
,求
的长.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eb0c11e4b7aa9030a6691aee35eed0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/610b2c88-4c84-4d7a-9040-276cfa14d363.jpg?resizew=359)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b2bb720422adaff7b28a2a679337877.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095503a8a6c443a2bef93bb334ce38c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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名校
2 . 如图,正方形
中,点
分别在
上,
交于点
;
_______.
(2)在线段
上截取
,连接
的角平分线交
于点
.
①依题意补全图形;
②用等式表示线段
与
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a1474d5ce4517c13de067ccc187d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebc3ceb9506738bfc13f0f88c3b498f.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31af8b1e89ea2dc9135a0b08f9267068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e904a1b23acc692e5861e294a6392318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①依题意补全图形;
②用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a8cfb3747c454e0698e12857ffae8.png)
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8卷引用:2023年北京市海淀区中考一模数学试题
2023年北京市海淀区中考一模数学试题(已下线)专题25 几何压轴题(共51题)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(北京专用)(已下线)2023年北京一模(几何综合)北京市陈经纶中学嘉铭分校2023-2024学年九年级下学期开学考数学试题北京人大附中丰台学校2023~2024学年九年级下学期开学考试数学试题2023年山东省临沂市初中学业水平数学模拟预测题(一)(已下线)专题04 四边形的证明与计算(全等、相似、边角计算)-2024年中考数学二轮热点题型归纳与变式演练(全国通用)北京十一实验中学2023-2024学年八年级下学期期中数学试题
3 . 如图,正方形
中,点
在对角线
上,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2bc65148bdd3ad5d2bac29116226d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab731af57ef1d6ef2860ea078c48b782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/9aebb424-e8f4-4b70-b966-1efd14395e9a.png?resizew=122)
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4 . 在正方形
中,
是一条对角线,点P在射线
上(与点C,D不重合)连接
,平移
.使点D移动到点C,得到
,过点Q作
于H,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/d7ec0604-d0ef-4ab8-91e7-d9b53791d232.png?resizew=347)
(1)若点P在线段
上,如图1.
①依题意补全图1;
②判断
与
的数量关系与位置关系并加以证明;
(2)若点P在线段
的延长线上,且
,正方形
的边长为1,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92905d020164683947943040ec19c530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e54ecf42a1ea773fb13be721396614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9aab574381a8df84ee57f1de815f34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/d7ec0604-d0ef-4ab8-91e7-d9b53791d232.png?resizew=347)
(1)若点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①依题意补全图1;
②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
(2)若点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de986491de579d7355fdfcb8feb9fd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
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名校
5 . 如图,在
中,
,用直尺和圆规作图,
交
于点
,根据作图痕迹,下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a36e4da640a6541c3af0d2d9a49ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:吉林省长春市绿园区新解放学校2023-2024学年九年级上学期期末数学试题
6 . 如图,在平面直角坐标系中,点A的坐标为
,点B为x轴上一动点,以
为边在直线
的右侧作等边三角形
.若点P为
的中点,连接
,则
的长的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a793cc332e498a2dcfd099bae9ef32d.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/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/a58c25d7-00b0-43af-9ae5-8bc6bfb6a18a.png?resizew=166)
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7 . 如图,O为半圆的圆心,C、D为半圆上的两点,连接
.连接
并延长,与
的延长线相交于点E.若
,半径
,则
的长为_____ ;
的长为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e86517e87fd34684781d2c7e4efb5e.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/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b42602dabcdc7bdaba0ee0af37d71f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/8bacef08-22c8-46a1-9abb-c03dce6a47bb.png?resizew=133)
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8 . 下面是多媒体上的一道试题:
如图,在菱形
中,过点
作
于点
,点
在边
上,
,连接
,
求证:四边形
是矩形.
小星和小红分别给出了自己的思路.
小星:先证明四边形
是平行四边形,然后利用矩形定义即可得证;
小红:先证明
与
全等,然后利用“有三个角是直角的四边形是矩形”即可得证.
(1)请你选择一位同学的思路,并进行证明;
(2)若
,
,求
的长.
如图,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ab82171f260a5e4b8ecce4a9ece7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
小星和小红分别给出了自己的思路.
小星:先证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
小红:先证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0c32d9f3badb7e51233dd39a39fbb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/44f985b1-a6b4-447d-a94d-aad37d500df2.png?resizew=148)
(1)请你选择一位同学的思路,并进行证明;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb80254d3581bf660a0bfd376de9dc01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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2卷引用:贵州省六盘水市2023-2024学年九年级上学期期中数学试题
名校
9 . 如图,已知点
,
在
上,
,
,
.
是平行四边形;
(2)直接写出图中所有相等的线段(
除外).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3139e28714bfc3d5d875d78dd245d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)直接写出图中所有相等的线段(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
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10 . 如图,已知
中,
,
厘米,
厘米,点D为
的中点. 如果点P在线段
上以每秒2厘米的速度由B点向C点运动,同时,点Q在线段
上以每秒a厘米的速度由C点向A点运动,设运动时间为t(秒)(
).
的长度;
(2)若点P、Q的运动速度相等,经过1秒后,
与
是否全等,请说明理由;
(3)若点P、Q的运动速度不相等,当点Q的运动速度a为多少时,能够使
与
全等?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2aa9b9894a953c812b52eba95559f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
(2)若点P、Q的运动速度相等,经过1秒后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2372b6955c69fdb23c9739ab5ed3304.png)
(3)若点P、Q的运动速度不相等,当点Q的运动速度a为多少时,能够使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2372b6955c69fdb23c9739ab5ed3304.png)
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