如图,AD∥BC,AD=BC,AE⊥AD,AF⊥AB,且AE=AD,AF=AB,求证：AC=EF.

如图,AD∥BC,AD=BC,AE⊥AD,AF⊥AB,且AE=AD,AF=AB,求证：AC=EF. 已知：如图,AD∥BC,AE平分∠BAD,AE⊥BE；说明：AD+BC=AB. 如图,已知AD//BC,AD=BC,AE⊥AD,AF⊥AB,AE=AD,AB=AF.求证：AC=EF. 已知:如图,AD平行BC,AE平分∠BAD,AE⊥BE；说明：AD+BC=AB 已知：如图,AD平行于BC,AE平分∠BAD,AE⊥BE；说明：AD+BC=AB 已知：如图,AD平行于BC,AE平分∠BAD,AE⊥BE；说明：AD+BC=AB 如图 AE=BF AD//BC AD=BC 求证 CE=DF 如图ae=bf,ad=bc,ad//bc,求证:oe=of 如图:AD//BC,AD=BC,AE=CF.求证：（1）DE=DF, 如图!AD=BC,AE=FC,DF=BE.求证AD平行BC 如图,AD//BC,AD=BC,AE=CF,证明：DE//BF. 如图,AD‖BC,AE=FC,AD=BC,求证：BE‖DF. 如图,AD=BC,AD‖BC,AE=FC,试说明BE‖DF. 如图,已知AD‖BC,AD=BC,AE=FC,求证:BE‖DF 【2009年,黄石市】如图,AD//BC,AE=FC,AD=BC.求证：BE//DF. 如图,已知AE⊥AD,AF⊥AB,AF=AB,AE=AD=BC,AD‖BC,求证AC⊥EF 如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC? 如图,ad⊥bc,