题目已知:如图,AD=CBAD=CBAD=CB,AE⊥BDAE\bot BDAE⊥BD,CF⊥BDCF\bot BDCF⊥BD,EEE、FFF是垂足,AE=CFAE=CFAE=CF.求证:BE=DFBE=DFBE=DF.知识点：直角三角形全等的判定章节：图形的性质 / 三角形
已知:如图,,,,、是垂足,.已知:如图,,,,、是垂足,.已知:如图,,,,、是垂足,.