ABADACAE的精選

問題詳情：如圖，△ABC和△ADE中,AB=AD,AC=AE,∠BAC＝∠DAE,BC交DE於點O，∠BAD=ａ.(1)求*：∠BOD=ａ.(2)若AO平分∠DAC,求*：AC=AD. (3)若∠C=30°，OE交AC於F,且△AOF為等腰三角形，則ａ=                       ...