AB=DC.AE=DF.CE=BF.求证：AF=DE.

如下图,AB=DC,BF=CE,AE=DF,求证AB//CD 如图,已知AB=DC AE=DF .CE=BF 求证:AF=DE AB=DC.AE=DF.CE=BF.求证：AF=DE. 如图,已知AB=DC,AE=DF,CE=BF,求证：AF=DE 已知:如图,AD=CD CE=BF DF=AE 求证AB‖DC 如图所示,AB=CD,AE=DF,CE=BF,求证 AE‖DF 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 AB=CD,AE垂直BC,DF垂直BC,CE=BF,求证AE=DF 如图所示,E,F为AD边上的两点,且AE=DF,AB=DC,BE=CF.求证：BF=CE.BF∥CE. AD平行BC,角ABC=角DCB,AB=DC,AE=DF,连接BF,CE求证BF=CE初二的知识 全等三角形 十万火急 如图所示,已知AB=DC,AE=DF,CE=BF试说明AF=DE 如图所示,已知点E、F在BC上,AB=DC,BF=CE. (1)若AE=DF,求证：CD∥AB (2如图所示,已知点E、F在BC上,AB=DC,BF=CE.(1)若AE=DF,求证：CD∥AB(2)若CD∥AB,求证：AE∥DF 已知：如图,E﹑F是线段BC上的两点,AB∥CD,AB=DC,CE=BF.求证：AE=DF. 已知：如图,E﹑F是线段BC上的两点,AB∥CD,AB=DC,CE=BF.求证：AE=DF. 如图所示,已知点E,F在BC上,AB=DC,BF=CE.（1）若AE=DF，求证CD//AB；（2）若CD//AB，求证AE//DF。 如图,AB=CD,AE⊥BC,DF⊥BC,CE=BF,求证AE=DF 如图,AB=CD,AE⊥BC,DF⊥BC,CE=BF,求证AE=DF