几何变换在现代几何理论和应用中都发挥了巨大的作用.所谓几何变换,就是平面到其自身的一一映射,在此映射下,图形F对应着图形F′.若A是F上的任意一点,通过该几何变换对应着F′中的点A′,其中,点A′称为A的像,A称为A′的原像.下面略举几例讨论几何变换中的三类:平移、对称、旋转 Geometric transformation has played a huge role in modern geometric theory and application. The so-called geometric transformation is the one-to-one mapping of plane to itself. Under this mapping, the graphic F corresponds to the graphic F ’. If A is any That point corresponds to the point A ’in F’, where point A ’is called the image of A and A is the original image of A’. A few examples are given below to discuss three types of geometric transformations: Translation Symmetrical, rotating