数学教学很大程度上归结为数学解题,立体几何特别利用几何法对于训练学生的空间位置和数量关系的,在初中平面几何的基础上有了更高的思维。所谓几何法:就是从条件出发,以定义、公理、定理为依据,通过辅助构图和推理,计算解决。它需要一定的空间想象力和逻辑思维能力。当然平面几何的知识是离不开的基础。说是立体几何,研究是空间的,但始终要转化为平面的。能否添加合适的辅助线和进行有效的转化是解决该题的关键。 Mathematics teaching is largely attributed to the mathematical problem solving, the use of geometric geometry in particular the geometric position for the training of students in the spatial position and the number of relations, in the junior high school geometry based on a higher thinking. The so-called geometric method: that is, starting from the conditions, the definition, axioms, theorems as the basis, through the auxiliary composition and reasoning, calculation and solution. It requires a certain degree of spatial imagination and logical thinking. Of course, the knowledge of plane geometry is inseparable from the foundation. Said to be three-dimensional geometry, research is space, but always be transformed into a plane. The key to solving this problem is whether to add the proper auxiliary line and to carry out effective transformation.