已知:AB=CD,AE=DF,BE=CF,判断CE与BF的关系快啊,希望哥哥姐姐能够帮我!

如图,已知BE=DF,AE=CF,AE∥CF,说明AB∥CD 已知AB=CD,BE=DF,AE=CF,问AB‖CD吗 如图,已知:BE=DF,AE=CF,AE平行CF.说明AB平行CD的理由 已知AB=CD,BE=DF,∠ABE=∠CDF,求证AE∥CF 如图,已知AB平行CD,AD平行BC,AE=CF,说明BE=DF. 已知BC,EF交点O,AB//CD,OA=OD,AE=DF,求证BE//CF 已知,AE=CF,EO=FO,BE//DF,求证AB//CD 已知AB=CD,AE=CF,BF=DE,说明:(1)BE=DF (2)BE//DF 已知：AB=CD,AE=CF,BF=DE,说明①BE=DF,②BE平行DF 已知AB=CD,AE=CF,BF=DE,说明:(1)BE=DF (2)BE//DF 如图CD=AB,DF=BE,AE=CF,求证:DF//BE 已知如图AB=CD AE=CF BE=DF请证明AB∥CD 已知ab平行cd,ab=CD,BE=DF,求证af平行ce,ae=cf 如图所示,已知AB=CD,BE=DF,AE=CF,求证:OA=OC,OE=OF 已知AB=CD,AE=CF,BE=DF,请说出角EBF=角EDF的理由. 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 已知AC、BD相交于O,AE=CF,EO=FO,BE//DF,求证AB//CD