如图,AB=AC=AD.
如图,AB=AC=AD.
如图,AC平分∠DAB,AB>AD,CB=AD,CE⊥AB于E
已知:如图,AB=AC,AE=AD,点D、E分别在AB、AC上.
已知,如图,AB⊥AC,AC⊥DC,AB=CD,求证AD∥CB
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,AC=AD
如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证BE⊥CD
如图,已知AB=AC,AD=AE.求证:BD=CE.
如图,∠BDA=∠CEA,AE=AD.求证:AB=AC.
如图,AB=AC,AD=AE.求证:∠B=∠C.
如图,AC⊥AB,AD⊥AE,且AB=AC,AD=AE,探究BD与CE的关系.
如图,AB,AC,AD是圆中的三条弦,点E在AD上,且AB=AC=AE.请你说明以下各式成立的理由: