这是关于任意正多边形关于任意直线的对称变换，打破了以前的只能对于一个固定的直线的对称变换，省去了关于固定直线对称时每次都要输入的麻烦-of arbitrary isogon of arbitrary linear symmetry transformation, breaking the former only for a fixed linear symmetry transformation, eliminating the symmetry of the fixed line every time when the importation of trouble