在解答立体可几何题时,许多学生常因空间想象能力差、空间概念模糊,导致计算、论证等方面出现障碍.但若能注意到几何图形的变式及应用,则可以化难为易.下面就常见的几种利用图形变式解题的方法予以归纳,以飨读者. When answering three-dimensional geometry problems, many students often have poor spatial imagination and spatial concepts, leading to obstacles in calculations, arguments, and other aspects. However, if one can take note of the variations and applications of geometry, it can be difficult to understand. Several common ways to solve problems using graphic variants are summarized to readers.