1 . 如图,在
中,
,点F在边
上,以
为直径的
切
于点D,交
于点E,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/b3c607d6-3a20-4065-8fdf-0a1ddd391d7a.png?resizew=163)
(1)求证:
平分
.
(2)已知
半径是2,连接
,若
,求弧
的长(结果保留π).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/b3c607d6-3a20-4065-8fdf-0a1ddd391d7a.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e94633285fd100c13a7cd4d13fad631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
您最近一年使用:0次
2023-04-22更新
|
171次组卷
|
2卷引用:浙教版九年级下册第二章直线与圆的位置关系单元测试数学试题
22-23九年级下·浙江杭州·阶段练习
2 . 如图,
是
的直径,C是
上的一个动点,延长
至
,使
,
垂直于弦
,垂足为点
,点
在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/467b9ff8-c85e-4f94-a6bc-e0214962b055.png?resizew=239)
(1)当
与
相切时,求
的度数;
(2)芳芳观察后发现,
的值为
,点点说
的值随动点
的变化而变化,你为谁的结论是正确的,请给予证明;
(3)设
,求
与
之间的函数关系式.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc1fc39fa72c334a321129d893899a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/467b9ff8-c85e-4f94-a6bc-e0214962b055.png?resizew=239)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df0ba997bb8f5b2f2a2b677391ebc22.png)
(2)芳芳观察后发现,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca91716d4c4b47185a7ddf88b435b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca91716d4c4b47185a7ddf88b435b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfe7bd500e01042eed9b25676264471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2023-04-11更新
|
209次组卷
|
3卷引用:浙教版九年级下册第二章直线与圆的位置关系单元测试数学试题
名校
3 . 如图,
为
的切线,A,B分别为切点,
,点P到圆心O的距离
,则
的半径为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/7c4864cc-03ed-4bb2-9348-d95715f44d65.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1dd47d59b9755e1815f18f3e22ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15b82151bff7cc0238d2034a6129f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07445aa3909818a3ef93bb01182f545f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/7c4864cc-03ed-4bb2-9348-d95715f44d65.png?resizew=160)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
2023-04-08更新
|
140次组卷
|
2卷引用:第31章 圆 单元测试卷 人教版(五四制)九年级数学上册
4 . 我们把半径之比等于黄金比的两个同心圆称为黄金同心圆.如图黄金同心圆中,
为大圆直径,
为大圆中的一条弦,且与小圆相切,小圆半径为1,设弦
的长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089f8ede46835a0d5ec4096e64f5db97.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/089f8ede46835a0d5ec4096e64f5db97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/c86b3207-2406-44a3-9c64-17367d179fd0.png?resizew=156)
您最近一年使用:0次
2023-04-01更新
|
112次组卷
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3卷引用:浙教版九年级下册第二章直线与圆的位置关系单元测试数学试题
浙教版九年级下册第二章直线与圆的位置关系单元测试数学试题浙江省杭州市上城区杭州绿城育华学校2022-2023学年九年级下学期3月月考数学试题(已下线)【浙江新东方】 2023年九年级下学期月考305数学试题
名校
5 . 下列说法中,不正确的有( )
①相等的圆周角所对的弧相等;
②平分弦的直径也平分弦所对的弧;
③长度相等的两条弧是等弧;
④经过圆心的每一条直线将圆分成两条等弧;
⑤圆的切线垂直于圆的半径;
⑥一个圆有无数个内接三角形.
①相等的圆周角所对的弧相等;
②平分弦的直径也平分弦所对的弧;
③长度相等的两条弧是等弧;
④经过圆心的每一条直线将圆分成两条等弧;
⑤圆的切线垂直于圆的半径;
⑥一个圆有无数个内接三角形.
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
2023-01-28更新
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158次组卷
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2卷引用:鲁教版九年级下册第五章单元测试数学试题
6 . 如图,⊙O是△ABC的外接圆,AE切⊙O于点A,AE与直径BD的延长线相交于点E.
(2)如图②,当AE=AB,DE=2时,求∠E的大小和⊙O的半径.
(2)如图②,当AE=AB,DE=2时,求∠E的大小和⊙O的半径.
您最近一年使用:0次
2023-10-27更新
|
1000次组卷
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10卷引用:第24章 圆(能力挑战卷)-【练好重点题】2021-2022学年九年级数学上学期综合训练卷(人教版)
(已下线)第24章 圆(能力挑战卷)-【练好重点题】2021-2022学年九年级数学上学期综合训练卷(人教版)2021年天津市滨海新区中考二模数学试卷天津市南开区第63中学2022-2023九年级上学期数学期末试题天津市西青区当城中学2022-2023学年九年级下学期结业考试数学试卷天津市第六十三中学2022-2023学年九年级上学期期末数学试题天津市集贤里中学2023-2024学年九年级上学期第二次月考数学试题宁夏回族自治区吴忠市盐池县第五中学2023-2024学年九年级上学期12月月考数学试题2024年广西壮族自治区中考二模数学试题2024年广西壮族自治区百色市田阳区中考一模数学试题(已下线)2024年天津市滨海新区中考模拟数学试题
7 . 如图所示,
与
轴相交于
,
,与
轴相切于点
,
是优弧
上的一点,则
等于
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bda45b7f565147f18a5c83bb8a23142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4460932196ad334decc9d264e790acc8.png)
![](https://img.xkw.com/dksih/QBM/2023/5/10/3234738757402624/3237493471600640/STEM/b686e37471324a55a1c4628d099d85e8.png?resizew=4)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/dd18fe3f-a926-48f0-9184-cac3f070da7e.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-25更新
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48次组卷
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2卷引用:京改版九年级数学上册第22章 圆(下) 单元测试卷
8 . 如图,
,
分别切
于点A,B,
切
于点E,交
,
于点C,D.若
的周长为
半径的3倍,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4460932196ad334decc9d264e790acc8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/fc90adfd-b844-4ebb-b39b-4307a61ee3f8.png?resizew=197)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 如图,⊙O的半径为1,OA=2,AB切⊙O于点B,弦BC∥OA,连接AC,则图中阴影部分的面积为________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/fff24c40-17e9-491f-844c-7b9b7319a12f.png?resizew=154)
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