题目如图,AB=CDAB=CDAB=CD,AE⊥BCAE\bot BCAE⊥BC,DF⊥BCDF\bot BCDF⊥BC,垂足分别为EEE,FFF,CE=BFCE=BFCE=BF.求证:AE=DFAE=DFAE=DF.知识点：全等三角形的判定与性质章节：图形的性质 / 三角形
如图,,,,垂足分别为,,.求证:.如图,,,,垂足分别为,,.求证:.如图,,,,垂足分别为,,.求证:.