如图,AB是⊙O的弦,OP⊥OA交AB于点P,过⊙O上点B的直线交OP的延长线于点C,且CP=CB.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958774233972736/2961744068050944/STEM/e4390f60-9574-4c37-9cfb-d12192cf39f1.png?resizew=153)
(1)求证:BC是⊙O的切线;
(2)若⊙O的半径为
,tan∠CBP=
.求BC的长.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958774233972736/2961744068050944/STEM/e4390f60-9574-4c37-9cfb-d12192cf39f1.png?resizew=153)
(1)求证:BC是⊙O的切线;
(2)若⊙O的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
更新时间:2022-04-19 21:46:38
|
相似题推荐
解答题-证明题
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适中
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【推荐1】如图,在
中,
,
于点D,E为
上一点,连接
交
于点G,点F在
上,且
,
,连接
、
.
![](https://img.xkw.com/dksih/QBM/2020/2/6/2393323508842496/2393999005573120/STEM/9cf5f7b338844f369ce80a223d5bb346.png?resizew=140)
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a2e63e2e76266d606946a11c1d75de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac4b2fccbda01fb17dfd8a01b12e0b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/2020/2/6/2393323508842496/2393999005573120/STEM/9cf5f7b338844f369ce80a223d5bb346.png?resizew=140)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efffb3e6a571832b723b3c5795b8e8c.png)
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【推荐1】如图,正方形
中,
,
是
的中点,将
沿
对折至
,延长
交
于点
,求
的长.
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7572ecc467c061ef71cf4486ec63ec3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/dda7aa8f-5946-424d-a217-3c1cc3159320.png?resizew=177)
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【推荐2】对于在平面直角坐标系中
和
外的点P,给出如下定义:已知
的半径为1,若
上存在点Q,满足
,则称点P为
的关联点.
(1)如图,若点T的坐标为
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/2ccc93f9-051e-42f6-b9d7-619bbb52424c.png?resizew=486)
①在点
,
,
中,是
的关联点的是______;
②直线
分别交x轴,y轴于点A,B,若线段AB存在
的关联点,求b的取值范围;
(2)已知点
,
,
,
上的每一个点都是
的关联点,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b000c616a47240bb01059028c56ba95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
(1)如图,若点T的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f47dd739c5d4883b5fe717f38e36504.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/2ccc93f9-051e-42f6-b9d7-619bbb52424c.png?resizew=486)
①在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd5a9883baf44c1d269e54eb3ed8991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef53536e0aae3f516097d8d7abce74f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d0ed8806d969bde51f69bfef01d2817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcc6c274efe20094c4289d2649e4bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b0ab5eb895c64310010e1d04d952b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049600a1c48860babd6a6a659c38f664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
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【推荐1】如图,
是
的弦,连接
,过点
作
交
与点
,连接
,满足
.
(1)试说明
与
相切;
(2)若
,
的半径是 2,求弧
与线段
所围成图形的面积.
![](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/f47ddc7c9fb41942160e3cafcf756776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a68215a94c076daafdb28ab8d1d04f.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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fa214672d73761cd2c89a505d146b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/e5adf130-7ba5-48b0-901f-c6c455187d1c.jpg?resizew=141)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72320e629d8e617ed37063bdd73be7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6612c697aa43a72115e5dce1106c0557.png)
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【推荐2】如图,
是四边形
的外接圆,
是
的直径,
,交
的延长线于点E,
平分
.
\![](https://img.xkw.com/dksih/QBM/2022/4/13/2957150434394112/2961045936480256/STEM/74696b22-33d2-43ed-b058-81360f9b5820.png?resizew=241)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c38bbe49284a2ceab26001ced8cfd56.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/86a2db6311e228ed33b6c71d0a5918cf.png)
\
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957150434394112/2961045936480256/STEM/74696b22-33d2-43ed-b058-81360f9b5820.png?resizew=241)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f0b4a22d2ef498a8056e9e9e1380f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐1】综合与实践课上,同学们以“矩形的折叠”为主题开展数学活动.
沿过点A 的直线折叠,使点 B落在
边上的点
处,折痕为
,则四边形
的形状为 .
(2)如图2,矩形纸片
的边长
,用图1中的方法折叠纸片,折痕为
,接着沿过点 D 的直线折叠纸片,使点 C落在
上的点
处,折痕为
.则
,
.
(3)如图3,矩形纸片
的长为
,宽为
,用图1的方法折叠纸片,折痕为
,在线段
上取一点 F(不与点
重合),沿
折叠
,点 C的对应点为
延长
交直线
于点 G.
①判断
与
的数量关系,并证明;
②当射线
经过
的直角边的中点时,请直接写出
的长.
![](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/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd0d50f4c6ed9cdb340f214a5aec4bb.png)
(2)如图2,矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa38f041e2bf7d4a48c26be1924cae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d9ae440bc188af69ed07bb7074e8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b6d0cf1c51302804d95d715178a7dc.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/c78a9462a38db32bcad8c9e4aeaa926d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb350074994eccd15cd3126ceabce41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824ac174d168f4ed43ffd35dcc868cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8345187c6b7d5d56714cc4966a1d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4250a88d0aef9fcac1511220b172e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe16a6227ad768a70e81a4cd9ca2052.png)
②当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a13d6e5b1d375e5de0b062d7f36e62b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4cacd518769ce19310f5d9c6e73b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-证明题
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(0.65)
名校
【推荐2】如图,四边形
中,对角线
与
相交于点O,
,
,点E在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/91f284f3-16c7-4a4d-8881-b3be089e042f.png?resizew=195)
(1)下列条件:①
;②点E与点C关于直线
对称;③E为
中点.
请从中选择一个能证明四边形
是菱形的条件,并写出证明过程.
(2)若四边形
是菱形,且
,
,
,求
的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/91f284f3-16c7-4a4d-8881-b3be089e042f.png?resizew=195)
(1)下列条件:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed9a0ee867b23b113682c83b1fb26c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
请从中选择一个能证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e1e4ea140260a790885868bc7a94f2.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e1e4ea140260a790885868bc7a94f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b52aa203b1c3b59de8ad6c7d0ed93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3364fddcfd9faa2c5828d7d31be09923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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