题目内容
已知如图,AD∥CE,则∠A+∠B+∠C=······ ( )
A.180° |
B.270° |
C.360° |
D.540° |
C
连接AC,∵AD∥CE∴∠DAC+∠ACE=180°, ∵∠BAC+∠B+∠BCA=180°
∴∠DAB+∠B+∠BCE=360°.故选C.
∴∠DAB+∠B+∠BCE=360°.故选C.
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题目内容
A.180° |
B.270° |
C.360° |
D.540° |