如图,⊙O与AB相切于点A,BO与⊙O于点C,∠CAB=27°,则∠B等于( ).
![](https://img.xkw.com/dksih/QBM/2017/10/23/1807819256635392/1831237284036608/STEM/9ec1944d73e845e89a36e625d11375e5.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2017/10/23/1807819256635392/1831237284036608/STEM/9ec1944d73e845e89a36e625d11375e5.png?resizew=143)
A.36° | B.54° | C.110° | D.140° |
17-18九年级上·全国·课后作业 查看更多[2]
更新时间:2017-12-12 20:22:00
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【推荐1】如图,一张长方形纸片
,它的四个内角都是直角,将其沿
折叠后,点C落在点E处,
交
于点F,再将
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折叠后,点E落在点G处,若
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【推荐2】如图,
中,
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【推荐1】如图,
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【推荐2】如图,
中,
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名校
【推荐1】如图,点E是⊙O中弦AB的中点,过点E作⊙O的直径CD,P是⊙O上一点,过点P作⊙O的切线与AB延长线交于点F,与CD延长线交于点G,若点P为FG中点,
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【推荐2】如图,AB是直径,点
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![](https://img.xkw.com/dksih/QBM/2017/12/1/1829155968417792/1830315908939777/STEM/ef88c9395f92403b934f7786a6fa829d.png?resizew=144)
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A.25° | B.40° | C.50° | D.65° |
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