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1 . 若一个直角三角形的两条直角边长分别为5cm和12cm,则这个三角形的外接圆的直径长为______ cm.
您最近一年使用:0次
20-21九年级·全国·课后作业
2 . 若
中,
,则它的外接圆的直径为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40500c26ed9ce9a99cc9f8921344f07c.png)
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3 . 已知
,
,
是等圆,
内接于
,点C,E分别在
,
上.如图,①以C为圆心,
长为半径作弧交
于点D,连接
;②以E为圆心,
长为半径作弧交
于点F,连接
;下面有四个结论:①
;②
;③
;④
,所有正确结论的个数是( )
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710058195361792/2717372882239488/STEM/ccd1098d-4307-4420-8937-c53e7d589b69.png?resizew=546)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd73875650e1538c4c61d5e16d3db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e86193eb11015543ddb6cc7ef8f26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0385df6c7f8ee7ab503b6ed35933695b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd73875650e1538c4c61d5e16d3db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e86193eb11015543ddb6cc7ef8f26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd73875650e1538c4c61d5e16d3db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e86193eb11015543ddb6cc7ef8f26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e436e8db81bea40afaac026de7a36a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fa0e1c9d68438a00d1af6de56a95bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fa5e65f8ed752bf4f637532a06ca6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce75097069b3789bc7375b2fb9cf0d3.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710058195361792/2717372882239488/STEM/ccd1098d-4307-4420-8937-c53e7d589b69.png?resizew=546)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
20-21九年级上·浙江杭州·期末
4 . 已知AB是
的弦,点C为圆上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/8e31c025-e224-40f2-9a40-b1f93d29a594.png?resizew=208)
(1)用直尺与圆规作
;
(2)作以AB为底边的圆内接等腰三角形;
(3)若已知圆的半径
,求所作等腰三角形底边上的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/8e31c025-e224-40f2-9a40-b1f93d29a594.png?resizew=208)
(1)用直尺与圆规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)作以AB为底边的圆内接等腰三角形;
(3)若已知圆的半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919ab22a373ed0374ebdca94c50b309f.png)
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20-21九年级上·浙江杭州·期末
5 . 如图,圆O的半径为R,正
内接于圆O,将
按逆时针方向旋转
后得到
,它的两边与AB相交于点D、E,则以下说法正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/27830545-a117-457c-89de-df25befe853a.png?resizew=191)
①
;②
;③
;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee9a493cad9779a6748023c1fdf952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/27830545-a117-457c-89de-df25befe853a.png?resizew=191)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8568dcc4941b35affaec3e80f029e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a9f36aa35d0591808106912fcffe2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5400d82a31a498510ced85c7c67f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee9a493cad9779a6748023c1fdf952a.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2021-05-06更新
|
421次组卷
|
4卷引用:专题2.49 圆(全章知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)
(已下线)专题2.49 圆(全章知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题24.38 圆(全章知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)【新东方】 初中数学1315【初三上】(已下线)第3章 圆的基本性质(基础、典型、易错、压轴)分类专项训练-2022-2023学年九年级数学考试满分全攻略(浙教版)
6 . 如图,⊙O是△ABC的外接圆,AB=5,BC=8,sinB=
.
(1)求边AC的长;
(2)求⊙O的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(1)求边AC的长;
(2)求⊙O的半径长.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712444955746304/2714658149761024/STEM/31ff1bf6880048a5bc93281f2d272381.png?resizew=209)
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20-21九年级上·浙江·期末
7 . 如图,在正方形
中,将
分别沿
折叠,折叠后点D与点C重合于点G,作
的外接圆,若
,则阴影部分的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a6824cd221701c7fe3f8cb4db5d6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc727c642cbc2181476b7dd8eca471e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/8611b312-cff2-44b5-bcf2-e77a64c094ef.png?resizew=139)
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20-21九年级上·浙江·期末
8 . 如图,矩形纸片
中,
,直
分别为
的中点,
分别为
上的点,将这张纸片沿
折叠,使点B与点G重合,则
的外接圆的面积为( )![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/542d467c-da35-4fa1-8479-5ab53902ab94.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f60be307e8f6a8b4034953a42d60745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36c50e6833c4f8ded2b3fafee57f641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914a4da61549b972654a013dced360db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbf5459b20ca890a47ebf8d51d90cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/542d467c-da35-4fa1-8479-5ab53902ab94.png?resizew=111)
A.![]() | B.![]() | C.![]() | D.![]() |
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19-20九年级·浙江·期末
9 . 如图,
内接于⊙O,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7f76ec4c-8418-49e2-a4e9-6574cc6d8191.png?resizew=143)
(1)求⊙O的半径;
(2)求劣弧
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90607d88cebfbdf81323d66582d9efd7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7f76ec4c-8418-49e2-a4e9-6574cc6d8191.png?resizew=143)
(1)求⊙O的半径;
(2)求劣弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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2019·浙江杭州·模拟预测
10 . 如图,正
内接于圆,将
沿
折叠,
沿
折叠.若该圆的半径为
,则图中阴影部分的面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/87e61410-cfce-4392-b155-bf7a308061ad.png?resizew=186)
您最近一年使用:0次