已知在一个圆中,直径为
,弦
相交于点
,若
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfa7a1be7ad897fa0c6fcb00cef3ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0c1dcd7c8dc10e81f4a31d94e5550d.png)
A.![]() | B.2 | C.![]() | D.![]() |
更新时间:2024-03-10 12:56:04
|
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单选题
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【推荐1】下列命题中是真命题的是( )
A.平分弦的直径,必垂直于这条弦; |
B.圆的切线垂直于圆的半径; |
C.从圆外一点可以引圆的两条切线,它们的切线长相等,这一点和圆心的连线平分两条切线的夹角 |
D.同圆中,等弦所对的圆周角相等 |
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单选题
|
较易
(0.85)
【推荐2】如图,点
在
上,若
,则
( )
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896561250803712/2977087175540736/STEM/b373f4ee-721d-4058-bb10-1f3a9bbe487f.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10ad623f3a05ecdc27b3f3e0169669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896561250803712/2977087175540736/STEM/b373f4ee-721d-4058-bb10-1f3a9bbe487f.png?resizew=141)
A.40° | B.50° | C.70° | D.80° |
您最近一年使用:0次