解:BC∥AF证明: 因为△ABC中,AB=AC,AF⊥BC,所以∠BAF=∠CAF又AD=AE,所以∠ADE=∠AED,又因为∠BAC=∠ADE+∠AED,∠BAC=∠BAF+∠CAF所以∠CAF=∠AED所以BC∥AF
没图啊!!!