如图,PA、PB分别与⊙O相切于点A、B,若∠P=50°,则∠C的值是( )
![](https://img.xkw.com/dksih/QBM/2019/7/25/2254478189117440/2255396653506560/STEM/33837502803f433195244c2974334a3f.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/2019/7/25/2254478189117440/2255396653506560/STEM/33837502803f433195244c2974334a3f.png?resizew=180)
A.50° | B.55° | C.60° | D.65° |
更新时间:2019-07-28 17:08:27
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【推荐1】如图,AB过半⊙O的圆心O,过点B作半⊙O的切线BC,切点为点C,连接AC,若∠A=25°,则∠B的度数是( )
A.65° | B.50° | C.40° | D.25° |
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【推荐2】如图,AB是⊙O的直径,AC切⊙O于A,BC交⊙O于点D,若∠C=70°,则∠AOD的度数为( )
![](https://img.xkw.com/dksih/QBM/2017/9/11/1778725922070528/1785274191257600/STEM/50b0d7a4e4b34464b494f2630772c653.png?resizew=90)
![](https://img.xkw.com/dksih/QBM/2017/9/11/1778725922070528/1785274191257600/STEM/50b0d7a4e4b34464b494f2630772c653.png?resizew=90)
A.70° | B.110° | C.40° | D.60° |
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