如图,已知AB//CD,角1=角2,求证AE//DF
已知:如图,AB//CD,角BAE+角CDF=180度.求证:AE//DF.
如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证角1=角2
已知;如图,CD⊥AD,DA⊥AB,∠1=∠2,求证:DF∥AE
如图已知AE=DF,AB平行CD,CE垂直于AD求证1角A=角D2BF=CE
如图 已知AB=CD,AE=DF,CE=BF.求证:AF=DE
已知:如图,AB=CD,BC=DA,AE=CF.求证:DF=DE
已知:如图,AD=CD CE=BF DF=AE 求证AB‖DC
如图,已知ABⅡCD,OA=OD,AE=DF,求证:BEⅡCF.
如图,已知AB‖CD,AE‖DF,求证∠BAE=∠CDF
如图已知AB‖CD,AE∥∠DF,求证∠BAE=∠CDF
如图,AB=CD,AE=DF,CE=BF,求证AE平行DF
如图,AB=CD,AE=DF,CE=BF,求证:AE平行DF