习题12.2 如图 AB=AC AD =AE 求证∠B=∠C

习题12.2 如图 AB=AC AD =AE 求证∠B=∠C 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. 如图,AB=AD,AC=AE, -习题-如图,在三角形ABC中,AD是BC边上的中线.其中,BC=6,AD=4,AB=5.请你说明AB=AC.-------大师帮忙 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,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. 如图,AC平分∠BAD.AC^2=AB×AD求证：BC^2/CD^2=AB/AD 如图,AC平分∠BAD,AC^2=AB*AD.求证BC^2/CD^2=AB/AD 已知:如图AC⊥BD,AB‖CD,AB=CD.求证:AD=AB 如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC. 如图,正五边形ABCD中,AC,AB是对角线,求证：AC=AD 如图,正五边形ABCD中,AC,AB是对角线,求证：AC=AD就这张图 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