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如图,AB是⊙O的直径,C,D是⊙O上的点,=,连接AD、AC,若∠DAB=55...
如图,AB是⊙O的直径,C,D是⊙O上的点,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100835090569512/SYS201311031008350905695021_ST/0.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100835090569512/SYS201311031008350905695021_ST/1.png)
,连接AD、AC,若∠DAB=55°,则∠CAB等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103100835090569512/SYS201311031008350905695021_ST/images2.png)
A.34°
B.16°
C.30°
D.35°
考点分析:
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如图,A、B、C是⊙O上的三点,∠AOC=100°,则∠ABC的度数为( )
A.30°
B.45°
C.50°
D.60°
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如图,AB是⊙O的直径,点C在⊙O上,连接OC,BC,若∠OCB=30°,则∠AOC的度数是( )
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A.30°
B.60°
C.90°
D.不能确定
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已知△ABC内接于⊙O,OD⊥AC于D,如果∠COD=32°,那么∠B的度数为( )
A.16°
B.32°
C.16°或164°
D.32°或148°
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如图,A、B、C是⊙O上的三点,∠BAC=45°,则∠BOC的大小是( )
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A.90°
B.60°
C.45°
D.22.5°
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如图,已知A,B,C是⊙O上的三点,若∠ACB=44°,则∠AOB的度数为( )
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A.44°
B.46°
C.68°
D.88°
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