如图,在
正方形网格中,一条圆弧经过A、B、C三点,那么
所对的圆心角的大小是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/1f3f5c84-c259-404e-865b-e07be072982d.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954253b16a82489bb0e152543428c68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/1f3f5c84-c259-404e-865b-e07be072982d.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
18-19九年级上·北京海淀·阶段练习 查看更多[10]
【全国百强校】北京市海淀区中国人民大学附属中学2018届九年级10月月考数学试题北京中国人大附中2018届九年级(上)期中数学试卷北京市第十四中学2021-2022学年九年级上学期期中数学试题北京市第六十六中学2021-2022学年九年级上学期期中数学试题北京市西城区铁路二中2021-2022学年九年级(上)期中数学试卷河南省郑州市枫杨外国语中学2022-2023学年九年级上学期期末数学试卷(已下线)第一节 圆的性质及其证明与计算02小题测江苏省徐州市黄集镇中心中学2022-2023学年九年级上学期第一次月考数学试题浙江省杭州市西湖区保俶塔申花实验学校2023-2024学年九年级上学期10月月考数学试题北京市海淀外国语实验学校学校2023-2024学年九年级上学期月考数学试题
更新时间:2023-02-26 14:57:28
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相似题推荐
单选题
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适中
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【推荐1】老师布置的作业中有这么一道题:
![](https://img.xkw.com/dksih/QBM/2022/11/4/3102389627281408/3105158091587584/STEM/141ba02c5ced44c182e6db1ac4cc22fa.png?resizew=293)
甲同学认为
,
,
这三条边不在同一个三角形中,无法解答,老师给的题目有错误,乙同学认为可以从中点
出发,构造辅助线,利用全等的知识解决,丙同学认为可以从点
作平行线,构造辅助线,利用全等的知识解决,你认为正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/d8b12eab-f9b9-405b-8f52-ab887e051743.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2022/11/4/3102389627281408/3105158091587584/STEM/141ba02c5ced44c182e6db1ac4cc22fa.png?resizew=293)
甲同学认为
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/d8b12eab-f9b9-405b-8f52-ab887e051743.png?resizew=143)
A.甲 | B.乙 | C.丙 | D.乙和丙 |
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【推荐2】如图,在等腰直角
和等腰直角
中,
,
,
恰好经过点A,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/c8f46db2-2d41-4055-9787-01c3c1219874.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c935d69d15537d0c770070bc31c9d4ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8db58bbd892d0bebaa5397f4e9fe6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/c8f46db2-2d41-4055-9787-01c3c1219874.png?resizew=173)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】如图,在
中,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/60362283-b2d9-4a4b-8b8e-e46e78984130.png?resizew=171)
(1)作
和
的垂直平分线交于点O;
(2)以点O为圆心,
长为半径作圆;
(3)
分别与
和
的垂直平分线交于点M,N;
(4)连接
,其中
与
交于点P.
根据以上作图过程及所作图形,下列四个结论中,
①
;②
;③点O是
的外心;④点P是
的内心.
所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/60362283-b2d9-4a4b-8b8e-e46e78984130.png?resizew=171)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)以点O为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(3)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(4)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d21bf39f2c8bdc196a2e589b6755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
根据以上作图过程及所作图形,下列四个结论中,
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c7bdd04797cb55ed01853f38cdd8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfae2b7bfaefb0fbda05d137156a745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
所有正确结论的序号是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,四个水平放置正方形的边长都为4,顶点A、B、C是圆上的点,则此圆的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/12/9/2614108630605824/2621046376833024/STEM/a73d63fc39a5472789088e0ee0d3b64d.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2614108630605824/2621046376833024/STEM/a73d63fc39a5472789088e0ee0d3b64d.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次