如图,
内接于
,
是
的直径,
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8117b8e89b9aa4ed51fbaa8df8381c25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/c6c1ae15-c008-4fd1-a09d-9bf91b67a3f1.png?resizew=132)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-06 04:41:40
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【推荐1】如图,
是
的直径,若
,∠D=60°,则
长等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b46682f7-7c31-4e2f-8792-cbf27f70e706.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9925407467278420029b8ab7b9561a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494529576e5b2b25074fcc7986c52a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/b46682f7-7c31-4e2f-8792-cbf27f70e706.png?resizew=158)
A.4 | B.5 | C.![]() | D.![]() |
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【推荐2】在⊙O中,同弦所对的圆周角( )
A.相等 | B.互补 | C.相等或互补 | D.都不对 |
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【推荐1】如图,⊙O是△ABC的外接圈,AD为⊙O的直径,若AD=10,AC=8,则cosB等于( )
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,AB是⊙O的直径,点C是⊙O上一点,若∠BAC=30°,BC=2,则AB的长为( )
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893854791639040/2896306672771072/STEM/a4ac32f2f93a45d8922938411abc6903.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893854791639040/2896306672771072/STEM/a4ac32f2f93a45d8922938411abc6903.png?resizew=112)
A.4 | B.6 | C.8 | D.10 |
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