平方差公式的几何意义
2020-07-09 14:37
本GeoGebra范例通过几何图形的面积割补与变换，直观演示了平方差公式 a^2 - b^2 = (a+b)(a-b) 的几何意义。利用多边形构造、平移和旋转等几何操作，将面积差转化为矩形面积，帮助学生从几何视角深刻理解代数公式的本质，适用于初中代数与几何结合的教学。
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