如图,AB∥CDAD∥BC,AE⊥AD,AE=AD,AF⊥AB,那么必有EF=AC为什么

如图,AD∥BC,AD=BC,AE⊥AD,AF⊥AB,且AE=AD,AF=AB,求证：AC=EF. 如图9,AD//BC,AE⊥AD且AE=AD,AF⊥AB且AF=AB.则AC与EF是否相等?为什么? 如图,已知AD//BC,AD=BC,AE⊥AD,AF⊥AB,AE=AD,AB=AF.求证：AC=EF. 如图,AB‖CD,AD‖BC,AE⊥AB,AF⊥AD,AE=AB,AF=AD,试说明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AE⊥AD,AF⊥AB,AF=AB,AE=AD=BC,AD∥BC,求证：（1）AC=EF（2）AC⊥EF 如图,已知AE⊥AD,AF⊥AB,AF=AB,AE=AD=BC,AD∥BC,猜想线段AC,EF的关系,并证明你 如图,AD平行BC,AE垂直AD,AF垂直AB,且AE=AD,AF=AB,则AC与EF是否相等?为什么? 如图,已知AE⊥AD,AF⊥AB,AB∥CD,AF=CD,AE=AD,求证：AC垂直EF. 如图,已知AD⊥AB,AD⊥AC,AE⊥BC.D是FG的中点,AF=AG,EF=EG.求证：BC∥FG. 如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF 问一道全等三角形的题2、如图,以知AE⊥AD,AF⊥AB,AF=AB,AE=AD=BC,AD‖BC.求证：1、AC=EF