ABCABACBD的精选

问题详情：如图,在△ABC,AB=AC,BD⊥AC于D,CE⊥AB于E,BD、CE相交于F.求*：AF平分∠BAC.【回答】*：∵BD⊥AC,CE⊥AB∴∠ADB＝∠AEC＝90∵∠BAD＝∠CAE,AB＝AC∴△ABD≌△ACE（AAS）∴AE＝AD∵AF＝AF∴△ADF≌△AEF（HL）∴∠BAF＝∠CAF∴AF平分∠BA...