问题:
已知如图,AD∥CE,则∠A+∠B+∠C=
A.180°
B.270°
C.360°
D.540°
已知如图,AD∥CE,则∠A+∠B+∠C=
A.180°
B.270°
C.360°
D.540°
A.180°
B.270°
C.360°
D.540°
参考答案: