已知,如图11-26.AB=AC,AD=AE,∠1=∠2.求证△ABE≌△ACD,

已知:如图AC⊥BD,AB‖CD,AB=CD.求证:AD=AB 如图,已知：AB=AE,AC=AD,AC⊥AD,AB⊥AE.求证：ED⊥BC. 如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC. 已知:如图,AC/AD=AB/DE=BC/AE.求证AB=AE 已知,如图,AD/AC=DE/AB=AE/BC,求证AB=AE 已知,如图,AD:AC=DE:AB=AE:BC 求证：AB=AE 已知如图AB=AC,求证AB²=AD×AE 已知:如图,AD/AB=AE/BC求证：AD/AE=DB/EC和AB/DB=AC/EC 已知:如图,AD/AB=AE/BC求证：AD/AE=DB/EC和AB/DB=AC/EC 如图,已知AD⊥AB,BE⊥AB,AD=BC,AC=BE.试说明：DC⊥EC 如图 已知AD/DB=AE/EC=3/2,求AB/DB,EC/AC,AB/AD 如图,已知AB/AD=AC/AE=BC/DE,试说明:AB*EC=AC*BD 如图,已知AB/AD=AC/AE=BC/DE,试说明:AB*EC=AC*BD 已知:如图,AB/AD=AC/AE=BC/DE,求证,AB乘EC=AC乘BD 如图,已知AD//BC,AD=BC,AE⊥AD,AF⊥AB,AE=AD,AB=AF.求证：AC=EF. 如图,已知AB=三分之一AC,AC=四分之一AD.AB+AC+AD=32cm,则AB= BC= CD=如图,已知AB=三分之一AC,AC=四分之一AD.AB+AC+AD=32cm,则AB= BC= CD= 如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC? 如图,AB⊥AC,AC⊥DC,AD=AB.试说明AD∥CB.