在如图,已知
的半径为4,
为
的直径,
为
的弦,
为
延长线上的一点,
,且
.
(1)求证:
是
的切线.
(2)求图中阴影部分的面积.
![](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/3d97cdc586744d208b6f69c9813af977.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/23/ab5e7b32-7fe0-413b-87ae-c1f0760d583f.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求图中阴影部分的面积.
20-21九年级上·广东广州·阶段练习 查看更多[3]
广东省广州市番禺区祈福英语实验学校2020-2021学年九年级上学期12月月考数学试题第27章 圆 27.3 圆中的计算问题华东师大版(2012)九年级下册课后作业(已下线)2024年湖北省初中学业水平考试一模考试数学试题及变式题21-24题
更新时间:2023-07-18 21:39:56
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,以
为直径的
与边
交于点
,过点
作
,垂足为点
,
的反向延长线交
与点
.
![](https://img.xkw.com/dksih/QBM/2021/5/17/2723007507193856/2729275550285824/STEM/b4c55fbc-ea6a-4621-bcb3-94c336a014a2.png)
(1)求证:
是
的切线;
(2)若圆的半径为10,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/5/17/2723007507193856/2729275550285824/STEM/b4c55fbc-ea6a-4621-bcb3-94c336a014a2.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若圆的半径为10,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4a391773ef598ae1415a904d466892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】已知:在
中,
是
的直径,
是弦,
,点P是
延长线上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/a49c68c4-c56b-442c-94f9-9bf9c5613cb4.png?resizew=195)
(1)求证:
是
的切线;
(2)若
,求
的直径.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c4fbb19fb0857dcfb200d9afa6c332.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/a49c68c4-c56b-442c-94f9-9bf9c5613cb4.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae16b72924eb24c45f5dcfab07cc01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐1】如图,已知直线
与
相切于点
,直径
,点
在
上移动,连接
交
于点
,连接
并延长
交直线
于点
.
![](https://img.xkw.com/dksih/QBM/2018/9/29/2042746897989632/2045141837832192/STEM/b49c517645ed4236b45c3b2a3dbd7f7f.png?resizew=158)
若
,求线段
的长;
若
与
相似,求
的度数和四边形
的面积(答案要求保留根号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0101a7b5c8a4aed0de2af363792e39a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2018/9/29/2042746897989632/2045141837832192/STEM/b49c517645ed4236b45c3b2a3dbd7f7f.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b826293fd7cf6dc42bfc221346e6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8091be731f58fff516ba8987e26f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97df54aa94a66dafdfb074b4ddee6be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be269a5c2f54739884dbfaa364562d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718e72739f072c591461872c6ed8a840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a21484bf5e9a7238298ba1762666e3.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】如图,在
中,
,
的平分线交BC于点D,点O在AB上,以点O为圆心,OA为半径的圆恰好经过点D,分别交AC,AB于 E,F.
(1)试判断直线BC与
的位置关系,并说明理由;
(2)若
,
,求阴影部分的面积(结果保留π).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(1)试判断直线BC与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1719410d21e3de1242366ce2965e838c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/e0e816c8-7649-41f4-bee5-4c8fb978b29f.png?resizew=163)
您最近一年使用:0次