如图,AD=BC,AB=CD,DE=BF,试说明DF=BC.
如图,AD=BC,AB=CD,DE=BF,试说明DF=BC.
如图,已知AB=CD,AD=BC,DE=BF,说明BE=DF
如图,ad=bc,ab=cd,de=bf,说明df=be
如图,AD=BC,AB=CD,DE=BF,是说明DF=BE的理由
已知:如图,AD=BC,AB=CD,DE=BF求证:BE=DF
已知如图,AB+AD=BC+CD,求证BF+DF=BE+DE
如图AB=DC,AD=BC,DE=BF求证BE=DF
如图,AD=BC,AB=DC,DE=BF,求证BE=DF
如图,AB=DC,AD=BC,DE=BF,求证:BE=DF
如图,已知:AB=DC,AD=BC,DE=BF.求证:BE=DF.
如图,已知AB=CD,AE=CF,DE=BF,求证AD=BC
如图,AD=BC AD//BC AE=CF,求证(1)DE=BF (2)AB//CD