BCAF的精选

问题详情：如图T6-5,在▱ABCD中,AE⊥BC,AF⊥CD,垂足分别为E,F,且BE=DF.图T6-5(1)求*:▱ABCD是菱形;(2)若AB=5,AC=6,求▱ABCD的面积.【回答】解:(1)*:∵四边形ABCD是平行四边形,∴∠ABC=∠ADC.∵AE⊥BC,AF⊥DC,∴∠AEB=...