如图:DC=BE,AB=DF,AB‖DF,求证△ABC≌△FDE
如图,AB=DF,AC||EF,AC=EF,∠F=∠1,求证:△ABC全等于△FDE
已知,如图,在△ABC中,AB=AC,DE⊥AB,DF⊥AC,DB=DC,垂足为E,F,求证:DE=DF
如图,已知点def分别是△abc的bc,ca,ab上的点,de∥ba,df∥ca,求证∠fde=∠a
如图,已知△ABC中,AB=AC,BE=CF.求证:DE=DF
如图,已知△ABC中,DF平行BC,EF平行DC,求证:AD^2=AB*AE
如图,△ABC中,D,E在AB上,AD=BE,DF‖EG‖BC,求证DF+EG=BC
已知,如图BE=CF,AB=DE,AC=DF,求证△ABC≌△DEF
如图,AB∥DE,AC∥DF,BE=CF.求证:△ABC≌△DEF.
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.