如图,△ABC是⊙O的内接三角形,连接OA、OB、OC.若∠AOB=40°,∠OBC=50°,AC=4,则⊙O的直径为( )
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680495409160192/2682859964497920/STEM/b56e410a-5d16-459d-b10b-9f848f317a21.png)
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680495409160192/2682859964497920/STEM/b56e410a-5d16-459d-b10b-9f848f317a21.png)
A.![]() | B.4 | C.![]() | D.8 |
2021·陕西西安·三模 查看更多[2]
更新时间:2021-03-21 21:15:28
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