如图所示,四边形ABCD为平行四边形,AD=a,BE//AC,DE交AC的延长线于点F,交BE于点EDC的延长线交BE于点M1)求证:DF=FE(2)若AC=2CF,∠ADC=60°,AC⊥DC,求BE的长(3)在(2)的条件下,求四边形ABED的面积图片其
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![如图所示,四边形ABCD为平行四边形,AD=a,BE//AC,DE交AC的延长线于点F,交BE于点EDC的延长线交BE于点M1)求证:DF=FE(2)若AC=2CF,∠ADC=60°,AC⊥DC,求BE的长(3)在(2)的条件下,求四边形ABED的面积图片其](/uploads/image/z/10428661-37-1.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%BA%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%2CAD%3Da%2CBE%2F%2FAC%2CDE%E4%BA%A4AC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%8E%E7%82%B9F%2C%E4%BA%A4BE%E4%BA%8E%E7%82%B9EDC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4BE%E4%BA%8E%E7%82%B9M1%29%E6%B1%82%E8%AF%81%3ADF%3DFE%282%29%E8%8B%A5AC%3D2CF%EF%BC%8C%E2%88%A0ADC%3D60%C2%B0%EF%BC%8CAC%E2%8A%A5DC%EF%BC%8C%E6%B1%82BE%E7%9A%84%E9%95%BF%EF%BC%883%EF%BC%89%E5%9C%A8%282%29%E7%9A%84%E6%9D%A1%E4%BB%B6%E4%B8%8B%EF%BC%8C%E6%B1%82%E5%9B%9B%E8%BE%B9%E5%BD%A2ABED%E7%9A%84%E9%9D%A2%E7%A7%AF%E5%9B%BE%E7%89%87%E5%85%B6)
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