如图,直线l与⊙O相切于点A,作半径OB并延长至点C,使得BC=OB,作CD⊥直线l于点D,连接BD得∠CBD=75°,则∠OCD=_____ 度.
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095476139835392/2097807714648065/STEM/b213c96503ac4a4fa349100786eb5de2.png?resizew=166)
17-18九年级·全国·单元测试 查看更多[3]
更新时间:2018-12-17 22:38:38
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