题目如图,AB=AEAB=AEAB=AE,∠ABC=∠AED\angle ABC=\angle AED∠ABC=∠AED,BC=EDBC=EDBC=ED,点FFF是CDCDCD的中点.求证:AF⊥CDAF\bot CDAF⊥CD.知识点:垂径定理章节:图形的性质 / 圆