问题:
如图,已知AB为⊙O的直径,∠CAB=30°,则∠D的度数为
A.30°
B.45°
C.60°
D.80°
如图,已知AB为⊙O的直径,∠CAB=30°,则∠D的度数为
A.30°
B.45°
C.60°
D.80°
A.30°
B.45°
C.60°
D.80°
参考答案: