如图,正方形ABCD的边长为a,正方形CEFG的边长为b(a大于b),且B,C,E三点在同一条直线上.试用a、b表示图中阴影部分的面积(阴影部分为三角形DFB
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![如图,正方形ABCD的边长为a,正方形CEFG的边长为b(a大于b),且B,C,E三点在同一条直线上.试用a、b表示图中阴影部分的面积(阴影部分为三角形DFB](/uploads/image/z/1352844-36-4.jpg?t=%E5%A6%82%E5%9B%BE%2C%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E7%9A%84%E8%BE%B9%E9%95%BF%E4%B8%BAa%2C%E6%AD%A3%E6%96%B9%E5%BD%A2CEFG%E7%9A%84%E8%BE%B9%E9%95%BF%E4%B8%BAb%EF%BC%88a%E5%A4%A7%E4%BA%8Eb%EF%BC%89%2C%E4%B8%94B%2CC%2CE%E4%B8%89%E7%82%B9%E5%9C%A8%E5%90%8C%E4%B8%80%E6%9D%A1%E7%9B%B4%E7%BA%BF%E4%B8%8A.%E8%AF%95%E7%94%A8a%E3%80%81b%E8%A1%A8%E7%A4%BA%E5%9B%BE%E4%B8%AD%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E7%9A%84%E9%9D%A2%E7%A7%AF%EF%BC%88%E9%98%B4%E5%BD%B1%E9%83%A8%E5%88%86%E4%B8%BA%E4%B8%89%E8%A7%92%E5%BD%A2DFB)
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