如图所示。已知AE⊥AB,AF⊥AC,AE=AB,AF=AC.求证:EC⊥BF
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
已知:如图,AB=AC,AE=AF,AE⊥EC,AF⊥BF,则∠1=∠2吗?为什么?
如图所示,已知AE垂直于AB,AF垂直于AC,AFE=AB,AF=AC,说明EC垂直于BF
如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF
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.
如图所示,已知三角形ABC中,AB=AC,F在AC上,在BA的延长线上取AE=AF,求证:EF⊥BC.
如图所示,已知△ABC中,AB=AC,F在AC上,在BA延长线上取AE=AF,求证:EF⊥BC
已知,如图,AE=AB AF=AC EC=BFM为CE与BF的交点,N为AC与BF的交点,求证∠C
已知,如图所示,AB=CD,BF⊥AC,DE⊥AC,AE=CF.求证:BD平分EF