论文部分内容阅读
正方形是轴对称图形,对角线所在的直线及每组对边的垂直平分线都是它的对称轴,运用正方形的这种轴对称性,可简捷明了地解答一类数学竞赛题．
The square is an axisymmetric pattern. The diagonal line and the vertical bisector of each pair of edges are its symmetry axes. This type of axis symmetry of the square can be used to solve a class of mathematics contests simply and clearly.