下列命题正确的是( )
A.三个点确定一个圆 | B.平分弦的直径垂直于弦,并且平分弦所对的弧 |
C.在同圆或等圆中,弦相等则所对的弧相等 | D.圆内接平行四边形一定是矩形 |
22-23九年级上·浙江杭州·期中 查看更多[2]
更新时间:2023-01-22 21:54:36
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,
中,
是直径,且
于
,则下列结论中不一定正确的是( )
![](https://img.xkw.com/dksih/QBM/2018/11/8/2071308678504448/2136358174113792/STEM/e6525a555fc44c56be433e1416b0c092.png?resizew=87)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad63ab71efa010821650ffe08bd907f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2018/11/8/2071308678504448/2136358174113792/STEM/e6525a555fc44c56be433e1416b0c092.png?resizew=87)
A.AP=PB | B.![]() |
C.∠AOB=4∠ACD | D.PO=PD |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,等腰
内接于
,直线
是
的切线,点C是切点,
是半径,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/851b414e-f9ca-4ce8-b971-c260a1666150.png?resizew=230)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e386954103489c58c15b489b654c5da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f9fe1c705e798c8a44a224a4b60f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/851b414e-f9ca-4ce8-b971-c260a1666150.png?resizew=230)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】下列命题中是真命题的是( )
A.三点确定一个圆; | B.平分弦的直径平分弦所对的弧; |
C.相等的弦所对的圆心角相等; | D.相等的弧所对的圆心角相等 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,已知
是
的直径,
与
相切于点
,
.则下列结论中不一定正确的是( )
![](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/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5540eca2ed2e6ebeee94b7919f964577.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/0e8019c5-e7e1-4106-9fcd-e93f1032d0ef.png?resizew=143)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,AB为圆O的直径,点C在圆O上,若∠OCA=50°,OB=2,则弧BC的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/55aa7330-65b8-467d-9f86-d2d0376684ff.png?resizew=102)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】在⊙O中,AB为直径,点C为圆上一点,将劣弧
沿弦AC翻折交AB于点D,连结CD.如图,若点D与圆心O不重合,∠BAC=25°,则∠DCA的度数( )
![](https://img.xkw.com/dksih/QBM/2019/11/9/2330359159898112/2331085006282752/STEM/2d6e4b4cd40d4320b7939e9e830bfa9b.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf92f47c9d324d4072c3219d9172119.png)
![](https://img.xkw.com/dksih/QBM/2019/11/9/2330359159898112/2331085006282752/STEM/2d6e4b4cd40d4320b7939e9e830bfa9b.png?resizew=131)
A.35° | B.40° | C.45° | D.65° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,⊙O的半径为2,四边形ADBC为⊙O的内接四边形,AB=AC,∠D=112.5°,则弦BC的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/1529ed0d-fd9a-407b-9b54-6635bd8b4afc.png?resizew=149)
A.![]() | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,
,
分别为
的两条弦,连接
,
,点
为
的延长线上一点,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2023/11/1/3358554731634688/3360248406179840/STEM/a472841693414dca9d8fc625c096a0cc.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7daf60566eb6f7aa237d45d96289d135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/2023/11/1/3358554731634688/3360248406179840/STEM/a472841693414dca9d8fc625c096a0cc.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次