Question

如圖,AB∥ED,∠B+∠C+∠D=(   )

A．180°­

B．360°­

C．540°­

D．270°

Answer 1

;【答案】B解析:
過點C作直線MN∥AB，則MN∥ED．
∴∠MCB+∠B=180°，∠MCD+∠D=180°．
∴∠B+∠BCD+∠D=∠MCB+∠MCD+∠B+∠D=180°+180°=360°．
故選B．