已知如图AB=CD AE=CF BE=DF请证明AB∥CD

如图,已知BE=DF,AE=CF,AE∥CF,说明AB∥CD 如图,已知:BE=DF,AE=CF,AE平行CF.说明AB平行CD的理由 如图,已知AB平行CD,AD平行BC,AE=CF,说明BE=DF. 已知如图AB=CD AE=CF BE=DF请证明AB∥CD 已知：如图AB=CD,AD=BC,BF＝D E （1）求证：AD//BC,AB//CD （2）求证：AE//CF,AE＝CF 如图CD=AB,DF=BE,AE=CF,求证:DF//BE 如图,已知A.B.C.D在一条直线上,AB=CD,BE⊥AD,CF⊥AD,AE=DF.求证:AF=DE 如图,已知A、B、C、D在一条直线上,AB=CD,BE⊥AD,CF⊥AD,AE=DF.求证：AF=DE 如图,已知ABⅡCD,OA=OD,AE=DF,求证：BEⅡCF.注：平行=Ⅱ 1.已知,如图 AE垂直BD,CF垂直BD,AB=CD,BE=DF.求证AD平行CB 如图 已知:ab∥cd ae⊥bd于e,cf⊥bd于f,be=df.说明ae=cd的理由. 如图,已知B、E、F、D在同一条直线上,BF=DE,AE=CF且AE∥CF,求证AB∥CD 如图AB=CD,BE=CF,AE=DF求证OA=OD 如图,AB=CD,BE=DF,AE=CF,求证:EO=FO? 如图,AE=DF,CE=BF,AB=CD,证明BE平行CF 已知AB=CD,BE=DF,AE=CF,问AB‖CD吗 已知:如图,AB=AC,AB⊥AC,BE⊥AE,CD⊥AE,垂足分别为A,E,D,求证:DE=BE+CD 已知：如图,AB=CD,BC=DA,AE=CF.求证：DF=DE