如图,已知AB=AC,DF∥AB,求证DF=DC
已知 如图三角形ABC中 AB=AC DB=DC DE垂直AB于E DF垂直AC于F 求证 DE=DF
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AB∥DE,AB=DE,BF∥CE.求证:AC∥DF
如图,AB=DE,AC=DF.BF=CF,求证AB//DE,AC//DF
如图,AB∥DC,AD∥BC,BE⊥AC于E,DF⊥AC于F,求证:BE=DF.
如图,已知AB=DC AE=DF .CE=BF 求证:AF=DE
已知如图AB=DC,AE=DF,CE=FB求证AF=DE
如图,已知AB=DC,AE=DF,CE=FB,求证AF=DE
如图,已知AB=DC,AE=DF,CE=BF,求证:AF=DE
已知:如图,AB=DC,AE=DF,CE=FB,求证:AF=DE
如图,已知:AB=DC,AD=BC,DE=BF.求证:BE=DF.
已知:如图,AD=CD CE=BF DF=AE 求证AB‖DC