已知:如图,AB,CD交于O点,CE‖DF,CE=DF,AE∥BF.求证:∠ACE=∠BDF.
1个回答
AE=BF?
CE平行DH 则∠CEO=∠DFO
180-∠CEO=180-∠DFO
即是∠BFD=∠AEC
又CE=DF AE=BF 则三角形AEC与BFD全等
则∠ACE=∠BDF 得证!
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