如图，五边形ABCDE中，AB∥CD，∠1、∠2、∠3分别是∠BAE、∠AED、∠EDC的外角，则∠1+∠2+∠3等于( )_刷题宝

题干

如图，五边形ABCDE中，AB∥CD，∠1、∠2、∠3分别是∠BAE、∠AED、∠EDC的外角，则∠1+∠2+∠3等于( )

A：90°

B：180°

C：210°

D：270°

上一题下一题 0.0难度选择题更新时间:2018-08-22 07:31:28

答案(点此获取答案解析）

B

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