问题:
如图,AO为⊙O的半径,∠ACB=15°.则∠OAB的度数为
A.75°
B.72°
C.70°
D.65°
如图,AO为⊙O的半径,∠ACB=15°.则∠OAB的度数为
A.75°
B.72°
C.70°
D.65°
A.75°
B.72°
C.70°
D.65°
参考答案: