如图12-2-6,AB=AC,AD=AE,BE=CD.求证：角ABD全等于角ACE.

如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC? 如图,AB=AD,AC=AE, 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 如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC. 如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证BE⊥CD 如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证BE⊥CD 如图AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证:△DAC≌三角形EAB 如图,已知：AB=AE,AC=AD,AC⊥AD,AB⊥AE.求证：ED⊥BC. 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ab:bd=ae:ce,求证ab:ac=ad:ae 如图,AD是三角形ABC的中线,AE垂直AC,AF垂直AB,且AE=AC,AF=AB,求证：AD=1/2EF 已知,如图,AB⊥AC,AB=AC,AD⊥'AE,AD=AE,求证:(1)BE=CD;(2)BC⊥CD急!帮个忙呗! 如图,AB=AE,AB⊥AE,AD=AC,AD⊥AC,M为BC中点,求证:DE=2AM 如图,在△ABC中,AD⊥AB,AD=AB,AE⊥AC,AE=AC,M为BC中点 求证：2AM=DE 如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE,求证:(1)△DAC≌△EAB;(2)BE⊥CD. ,の 如图 已知AD/DB=AE/EC=3/2,求AB/DB,EC/AC,AB/AD