BCAF的精選

問題詳情：如圖T6-5,在▱ABCD中,AE⊥BC,AF⊥CD,垂足分別為E,F,且BE=DF.圖T6-5(1)求*:▱ABCD是菱形;(2)若AB=5,AC=6,求▱ABCD的面積.【回答】解:(1)*:∵四邊形ABCD是平行四邊形,∴∠ABC=∠ADC.∵AE⊥BC,AF⊥DC,∴∠AEB=...