已知AE⊥AB,AF⊥AC,AE＝AB,AF＝AC.求证EC＝BF,EC⊥BF快

如图所示,已知ae⊥ab,af⊥ac,ae=ab,af=ac.求证ec⊥bf 已知AE⊥AB,AF⊥AC,AE＝AB,AF＝AC.求证EC＝BF,EC⊥BF快 如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF 如图所示,已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.求证：（1）EC=BF；（2）EC⊥BF. 已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.试证明:(1)EC=BF;(2)EC⊥BF 如图所示,已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.求证①EC=BF②EC⊥BF. 如图所示,已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.求证：（1）EC=BF；（2）EC⊥BF 已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.试证明:(1)EC=BF;(2)EC⊥BF 如图8,已知:AE⊥AB,AF⊥AC,AE=AB,AF=AC.试证明:(1)CE=BF;(2)CE⊥BF 已知AD是△ABC的中线AE⊥AB,AF⊥AC且AE=AB,AF=AC连接EF求证AD=1/2EF 已知AD是△ABC的中线AE⊥AB,AF⊥AC且AE=AB,AF=AC连接EF求证AD=1/2EF 如图,已知AE⊥AD,AF⊥AB,AF=AB,AE=AD=BC,AD‖BC,求证AC⊥EF 如图,已知AD//BC,AD=BC,AE⊥AD,AF⊥AB,AE=AD,AB=AF.求证：AC=EF. 如图,已知AE⊥AD,AF⊥AB,AB∥CD,AF=CD,AE=AD,求证：AC垂直EF. 已知ae⊥ab,ae⊥ab af⊥ac ae=ab af=ac 求证ec=bf,ec⊥bf图画错了 这个是对的 如图,已知：AD是△ABC的中线,AE⊥AC,AF⊥AB,且AE＝AC,AF＝AB试判断AD与EF的关系,并说明理由 如图所示,已知AB=AC,AE=AF,AE⊥Ec,AF⊥BF,垂足点为E、F求证：∠1=∠2 已知：如图,AB=AC,AE=AF,AE⊥EC,AF⊥BF,则∠1=∠2吗?为什么?