在矩形ABCD中,AB=3,在边CD上适当选定一点E,沿直线AE把三角形ADE折叠,使点D恰好落在边BC上一点F处,且ABF的面积为6,求AD长 2.写出两个与EF,EC都有关的数量关系式 3.求折痕AE长度
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![在矩形ABCD中,AB=3,在边CD上适当选定一点E,沿直线AE把三角形ADE折叠,使点D恰好落在边BC上一点F处,且ABF的面积为6,求AD长 2.写出两个与EF,EC都有关的数量关系式 3.求折痕AE长度](/uploads/image/z/903624-24-4.jpg?t=%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E4%B8%AD%2CAB%3D3%2C%E5%9C%A8%E8%BE%B9CD%E4%B8%8A%E9%80%82%E5%BD%93%E9%80%89%E5%AE%9A%E4%B8%80%E7%82%B9E%2C%E6%B2%BF%E7%9B%B4%E7%BA%BFAE%E6%8A%8A%E4%B8%89%E8%A7%92%E5%BD%A2ADE%E6%8A%98%E5%8F%A0%2C%E4%BD%BF%E7%82%B9D%E6%81%B0%E5%A5%BD%E8%90%BD%E5%9C%A8%E8%BE%B9BC%E4%B8%8A%E4%B8%80%E7%82%B9F%E5%A4%84%2C%E4%B8%94ABF%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BA6%2C%E6%B1%82AD%E9%95%BF+2.%E5%86%99%E5%87%BA%E4%B8%A4%E4%B8%AA%E4%B8%8EEF%2CEC%E9%83%BD%E6%9C%89%E5%85%B3%E7%9A%84%E6%95%B0%E9%87%8F%E5%85%B3%E7%B3%BB%E5%BC%8F+3.%E6%B1%82%E6%8A%98%E7%97%95AE%E9%95%BF%E5%BA%A6)
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