已知AD=AE,DM=EN,AD⊥DC,AE⊥EB.求证AB=AC
如图所示,已知AB⊥AC,AD⊥AE,AB=AC,AD=AE,求证:BE=DC
已知:如图,等腰梯形ABCD中,AD//BC,AB=DC,延长CB到E,使EB=AD,连结AE.求证:AE=CA
已知,AB=AD,AC=AE,角1=角2,求证DC=BE
如图,已知AD//BC,AD=BC,AE⊥AD,AF⊥AB,AE=AD,AB=AF.求证:AC=EF.
如图,AD⊥AE,AB垂直AC,AD=AE,AB=AC,AD⊥AE ,AB=AC,求证:三角形ABD≌三角形ACE
ab平行dc,且AD=BC,AE=CF求证AB=DC EB=DF
如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC.
已知:如图,AB=AC,EB=EC,AE的延长线交BC于点D,求证:AD⊥BC.
如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF
已知:在△ABC中,DB⊥AB,DC⊥AC,CE⊥AD,垂足为B,C,F,求证:AC²=AB×AE
已知AE⊥AD,AF⊥AB,AE=AD=BC,AD‖BC,求证:⑴AC=EF⑵AC⊥EF
如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证BE⊥CD