如图,AD∥BC 且AD=BC,AE=CF, 求证:①AB=DC ②EB=DF

如图,AD∥BC,AD=BC,AE⊥AD,AF⊥AB,且AE=AD,AF=AB,求证：AC=EF. 如图,在直角梯形ABCD中,AB∥CD,AD⊥DC,AB=BC,且AE垂直BC 已知：如图,AD∥BC,AE平分∠BAD,AE⊥BE；说明：AD+BC=AB. 如图,AD∥BC 且AD=BC,AE=CF, 求证:①AB=DC ②EB=DF 如图,BC∥AD,E为CD的中点,且AB=AD+BC,求证:AE平分∠BAD,BE平分∠ABC. 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 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. 已知如图,△ABC是等边三角形,AD⊥BC于D,CE∥AB,且AE⊥EC求证：AE=AD 如图,在四边形ABCD中,AB平行CD,AD⊥DC,AB=BC,且AE⊥BC,求证AD=AE 如图,DE//BC,请问AD:AC=AE:AB?AD:AE=AB:AC?