已知:如图,AD=BC,AE=BE,∠A=∠B,DF=CF 求证:EF⊥CD
已知:如图,AD=BC,AE=BE,∠A=∠B,DF=CF 求证:EF⊥CD
如图,已知BE=DF,AC=CF,AE‖CF.求证:AD‖BC.
如图,已知AB⊥BC,AE⊥EF,AC=DF,BE=CF.求证AC平行于DF.
如图,已知AD‖BC,AD=CB,AE=CF.求证:DF=BE
如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证:(1)∠E=∠F;(2)∠1=∠2.
如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证:∠1=∠2
已知BC,EF交点O,AB//CD,OA=OD,AE=DF,求证BE//CF
已知BE=DF,AE=CF,AE‖CF,求证:AD‖BC
如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证角1=角2
已知,如图,AD=BC,AE=CF,BE⊥AC,DF⊥AC,垂足分别为E,F,求证;DF=BE
已知,如图,ab=ae,bc=ed,∠b=∠e,af⊥cd,垂足为f.求证:cf=df 可画辅助
已知:如图,AB=AE,∠B=∠E,BC=ED,CF=DF.求证:AF⊥CD.