如图,已知角1=角2,AB=AC,AE=AD.求证:BD=EC

如图,已知AB=AC,AD=AE,求证：BD=EC. 已知:如图,AB/AD=AC/AE=BC/DE,求证,AB乘EC=AC乘BD 如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC. 已知:如图,AD/AB=AE/BC求证：AD/AE=DB/EC和AB/DB=AC/EC 如图,△ABC中,DE//BC,AD/BD=AE/EC,求证EC/AC=BD/AB 已知:如图.AB=AC,AE=AD,BD=EC,求证:∠BAE=∠DAC 如图,已知ad:bd=ae:ec=5:2,求ab:bd,ae:ac的值 如图,已知AB=AC,AD=AE,BD=CE,求证角3=角1+角2 如图,已知AB=AC,AD=AE,BD=CE,求证,角3=角1+角2 如图,已知AD\BD=AE\EC=3\2,试求:（1)AB\BD的值 (2）EC\AC的值 如图所示,在三角形ABC中,AD/BD=AE/EC,求证EC/AC=BD/AB 如图,已知AB/AD=AC/AE=BC/DE,试说明:AB*EC=AC*BD