如图,已知半圆O的直径
,C是圆外一点,
的平分线交半圆O于点D,且
,联结
交
于点E.
时,求
的长;
(2)当
时,求
的值;
(3)当
为直角三角形时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac117d79db75ce7f945bdc43c25b8d9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022f0dc17db5fcc83b204dc845447ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3715ede799ef1b110c89c30ba88f67.png)
2023·上海宝山·二模 查看更多[6]
2023年上海市宝山区中考二模数学试题(已下线)2023年上海市二模(几何综合)(已下线)九年级数学开学摸底考02(上海专用)-2023-2024学年初中下学期开学摸底考试卷(已下线)专题11与圆有关的分类讨论(含2024年上海最新模拟)(4大易错点+强化训练)-备战2024年中考数学考试易错题(上海专用)(已下线)专题07 相似三角形(4大热点题型)(含24年上海最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)(已下线)专题14 压轴25题几何综合题60题专练(含上海24年最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)
更新时间:2023-04-29 16:26:11
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相似题推荐
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】如图,
为
直径,弦
交
于点E,G为
上一点,连接
交
于点F,交
于点H,连接
,且
.
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733577405865984/2740515015188480/STEM/a195087c-c993-43ab-bb10-da19d03435d4.png?resizew=393)
(1)如图1,求证:
;
(2)如图2,若
,求证:
;
(3)如图3,在(2)的条件下,若
,求
的半径.
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.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/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5eaf920ccb43c5e05f12608e04d860.png)
![](https://img.xkw.com/dksih/QBM/2021/6/1/2733577405865984/2740515015188480/STEM/a195087c-c993-43ab-bb10-da19d03435d4.png?resizew=393)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30096b5593fc1b2d1fb57fefe09f2a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2973d7ef6b2341db1706cceeaefa2f.png)
(3)如图3,在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e234bc942260b61c9a1b94e77c0b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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【推荐2】如图,⊙
是
的外接圆,弦AE交BC于点D,且
.
(1)求证:AB=AC;
(2)连接BO并延长交AC于点F,若AF=4,CF=5,求⊙O的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ced67c735cf32a0f574be2d91c56690.png)
(1)求证:AB=AC;
(2)连接BO并延长交AC于点F,若AF=4,CF=5,求⊙O的半径.
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解答题-证明题
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真题
【推荐1】如图,点A在以
为直径的⊙
上,
的角平分线与
相交于点E,与⊙
相交于点D,延长
至M,连结
,使得
,过点A作
的平行线与
的延长线交于点N.
![](https://img.xkw.com/dksih/QBM/2021/6/28/2752704046891008/2752810726727680/STEM/d95e8575-18e9-4ae7-bca2-963d3f8eedd2.png)
(1)求证:
与⊙
相切;
(2)试给出
之间的数量关系,并予以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c11b8c385c8e65847b3f2aa64d1aed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/6/28/2752704046891008/2752810726727680/STEM/d95e8575-18e9-4ae7-bca2-963d3f8eedd2.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)试给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e633c73b42211031779a268cd44e9c50.png)
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解答题-作图题
|
较难
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【推荐2】如图是由边长为
的小正方形构成的
网格,每个小正方形的顶点叫做格点.
的顶点在格点上.仅用无刻度的直尺在给定网格中画图,画图过程用虚线表示,画图结果用实线表示.
(1)在图1中,先画出
的平行线
交
边于点
,再在
边上画点
,使
.
(2)在图2中,先在边
上画点
,使
于点
,再在边
上画点
,使
的值最小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a29c7aac951e1aae47227bfaa48bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/24/7bd92c44-8c39-4d09-9213-ceb4473f3901.png?resizew=365)
(1)在图1中,先画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905ed21f99fb738f386e726045266603.png)
(2)在图2中,先在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc8ccede05f9270d0f04a9545636790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe1d9b370fbf940911eb5128dbc3d00.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,
是
的直径,点C在
上,
,
.
(1)求
;
(2)点D为
上的一个动点,且位于直线
的上方,点D从点B开始沿着
运动至点C,连接
并延长,交
于点E,连接
.
①当
平分
时,试探究
和
三者之间的等量关系,并证明你的结论;
②
与
交于点P,求点E运动过程中,点P的运动的路径长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36786af6d53e846da8a90bb3065a211c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47c445c459b6cbc6f68dcf57c95ba07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/a29d5618-6e98-4111-bac9-530cd1c42db0.png?resizew=195)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd01722c6f4bf06ae7d753938e5b8bc.png)
(2)点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fdabbc710e604dc8aa9d133bc960a6.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5345f892125374809bcaaab5da8d3f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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解答题-证明题
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较难
(0.4)
【推荐2】如图1,在
中,
,D为
上一点,连结
,作
,交
于点E,且
,动点P从点E出发向点A运动,同时动点Q从点A出发沿射线
运动,过程中满足
,设
.
(1)求证:
.
(2)求y关于x的函数表达式.
(3)连结
,
①当
与
中的一个内角相等时,求
的值;
②如图2,当点Q在线段AC上时,以
,
为邻边作平行四边形
,若
所在直线平分平行四边形
的面积,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e085c4a6808aca284da0bd381ed27b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8225b3e02f5a9f1fd5a09ada650cb78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c92a1f7837bb64f06255b5f6c3e7cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca987ab7dd100a7300429c4cccf0c641.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/d204c3e9-946a-4ccd-9e3b-cb43d9e231e9.png?resizew=465)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d78524f98b01fa1dadfd277939665b9.png)
(2)求y关于x的函数表达式.
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adeb86525f32e304ffc6633f2bb2ec59.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5188fe411a739497927e65b1da478cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128147bd4834566a78b4e9d2a3b2139c.png)
②如图2,当点Q在线段AC上时,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a09b53ed83b87e40a88c096693543bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde50013c26cbfb66d7c500ba4bfcbd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fde50013c26cbfb66d7c500ba4bfcbd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d06fad1ed5a452a835e9a02cb011ed2.png)
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