如图,△ABC内接于⊙O,AC=AB,∠BAC=50°,
![](https://img.xkw.com/dksih/QBM/2019/11/30/2344912814817280/2345146708426752/STEM/e75bbb5d9dea4172982bcab7c97bd3fe.png?resizew=114)
(1)作出圆心O;(要求用尺规作图,不写作法和证明,保留作图痕迹)
(2)经过点B作直径BF,连接AF,求∠AFB和∠ABF的度数.
![](https://img.xkw.com/dksih/QBM/2019/11/30/2344912814817280/2345146708426752/STEM/e75bbb5d9dea4172982bcab7c97bd3fe.png?resizew=114)
(1)作出圆心O;(要求用尺规作图,不写作法和证明,保留作图痕迹)
(2)经过点B作直径BF,连接AF,求∠AFB和∠ABF的度数.
更新时间:2019-11-30 17:56:06
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