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题目如图1,正方形ABCD的对角线相交于点,又是正方形A1B1C1O的一个顶点,两个正方形的边长相等,那么无论正方形A1B1C1O绕点O怎样转动,两个正方形重叠部分的面积,总等于正方形面积的
The title is shown in Figure 1. The diagonal of the square ABCD intersects at the point and is a vertex of the square A1B1C1O. The lengths of the sides of the two squares are equal. Then regardless of how the square A1B1C1O rotates around the point O, the area of the overlapping portions of the two squares is the total. Equal to the square area