几何教学以培养学生的空间想象能力 ,逻辑思维能力和计算能力作为出发点 ,对图形的处理 ,一方面通过对图形添加辅助线、辅助面 ,构造出新的图形 ,另一方面指对图形的平移、分割、补全、折叠、展开等变形 ,通过以上两种方式的处理可以使立体图形平面化 ,复杂图形简单化 ,从而使 Geometry teaching takes students’ spatial imagination ability, logical thinking ability and calculation ability as the starting point. On the one hand, the processing of graphics is to construct new graphics by adding auxiliary lines and auxiliary surfaces to the graphics, and on the other hand to refer to the translation of the graphics. , Dividing, Completing, Folding, Unfolding and other deformations. Through the above two methods, the three-dimensional graphics can be flattened and the complex graphics can be simplified.