轴对称

对称轴或线对称指一个图形沿一条直线折叠，直线两旁的部分能够互相重合。更广泛的对称形式为旋转对称。

具有对称轴的图形

对称轴

若函数 $y=f(x)$ 有对称轴且为 $Ax+By+C=0$ ，则有 $y-2B{\frac {Ax+By+C}{A^{2}+B^{2}}}=f(x-2A{\frac {Ax+By+C}{A^{2}+B^{2}}})$ [1]

相关主题

点对称

参考资料

. [2014-07-17]. （原始内容存档于2015-09-24）.

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