一、图形变换思想的地位和作用所谓“图形变换”，就是按照某种对应法则，将图形Ｆ变为另一个图形Ｆ．若Ｆ与Ｆ可以完全重合，这种图形变换叫做合同变换（合同变换包括平移，翻折，旋转三种）．若图形Ｆ与Ｆ的形状相同，大小不一定相同，这种变换叫做相似变换．实质... First, the status and role of graphical transformation of ideas The so-called “graphic transformation” is in accordance with a corresponding law, the graphics F into another graphic F. If F and F can be completely coincident, this graphic transformation is called contract transformation (contract transformations include translation, folding, and rotation). If the shapes of the graphs F and F are the same and their sizes are not necessarily the same, this transformation is called similarity transformation. substance...