问一道初二(北师大版)数学几何题如图,矩形纸片ABCD中,AB=3cm,BC=4cm.现将点A,C重合,使纸片折叠压平,设折痕为EF,试求AF的长和重叠部分△AEF的面积.
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![问一道初二(北师大版)数学几何题如图,矩形纸片ABCD中,AB=3cm,BC=4cm.现将点A,C重合,使纸片折叠压平,设折痕为EF,试求AF的长和重叠部分△AEF的面积.](/uploads/image/z/8889448-40-8.jpg?t=%E9%97%AE%E4%B8%80%E9%81%93%E5%88%9D%E4%BA%8C%EF%BC%88%E5%8C%97%E5%B8%88%E5%A4%A7%E7%89%88%EF%BC%89%E6%95%B0%E5%AD%A6%E5%87%A0%E4%BD%95%E9%A2%98%E5%A6%82%E5%9B%BE%2C%E7%9F%A9%E5%BD%A2%E7%BA%B8%E7%89%87ABCD%E4%B8%AD%2CAB%3D3cm%2CBC%3D4cm.%E7%8E%B0%E5%B0%86%E7%82%B9A%2CC%E9%87%8D%E5%90%88%2C%E4%BD%BF%E7%BA%B8%E7%89%87%E6%8A%98%E5%8F%A0%E5%8E%8B%E5%B9%B3%2C%E8%AE%BE%E6%8A%98%E7%97%95%E4%B8%BAEF%2C%E8%AF%95%E6%B1%82AF%E7%9A%84%E9%95%BF%E5%92%8C%E9%87%8D%E5%8F%A0%E9%83%A8%E5%88%86%E2%96%B3AEF%E7%9A%84%E9%9D%A2%E7%A7%AF.)
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