已知,如图,AD:AC=DE:AB=AE:BC 求证：AB=AE

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 如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC? 如图,已知AB=AC,DE‖BC,试说明:AD=AE. 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 已知：如图,在△ABC中,AD平分∠BAC,DE‖AC交AB于点E,求证：AE：AB+AE：AC=1 已知,如图,AD/DB=AE/EC,证明DE/BC=AE/AC 如图,已知AB=AD,AC=AE,角1=角2.说出BC=DE的理由 如图,已知AB=AD,AC=AE,角BAD=角CAE.试说明BC=DE 如图,已知Ab =AD,AC=AE,角1=角2,求证：BC=DE 如图,已知AB=AD,AC=AE,角BAD=角CAE.试说明BC=DE 如图已知ab=ad,ac=ae∠bad=∠eac是说明bc=de 已知：如图,AB=AD,AC=AE,∠BAD=∠CAE,求证：BC=DE 如图已知AB=AE,AC=AD,BC=DE,试说明角CAE=角DAB 初二数学题：已知：如图,AB=AD,AC=AE,∠1=∠2,求证：BC=DE