3 立体几何的结构体系、知识内容、处理方式、呈现形式有很大变化,如何适应这种变化比较突出的是《数学2》中立体几何初步的内容.与传统的立体几何的结构体系相比,新课程中的立体几何的结构体系有重大改革.传统的立体几何内容,常从研究构成空间几何体的基本要素:点、直线和平面开始,讲述平面及其基本性质,点、直线、平面之间位置关系和有关公理、定理,再研究由它们组成的几 3 The structural system, knowledge content, processing methods, and presentation styles of the three-dimensional geometry have greatly changed. How to adapt to this change is more prominent in the preliminary content of the three-dimensional geometry in “Mathematics 2”. Compared with the traditional three-dimensional geometric structure system The structure of the three-dimensional geometric structure in the new curriculum has undergone major reforms. The traditional three-dimensional geometric content often begins with the study of the basic elements of spatial geometry: points, lines, and planes. It describes planes and their basic properties, points, lines, and planes. Inter-positional relations and related axioms, theorems, and then the study of these