问题:
如图,等边△ABC内接于⊙O,则∠AOB等于
[ ]
A.120°
B.130°
C.140°
D.150°
如图,等边△ABC内接于⊙O,则∠AOB等于
B.130°
C.140°
D.150°
[ ]
A.120°B.130°
C.140°
D.150°
参考答案: