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1内容概述本章知识内容具体安排如表1所示(仅供参考)。1.1知识结构本章知识结构如图1所示。1.2教科书内容本章的主要内容包括:投影的基础知识(包括投影、平行投影、中心投影、正投影等概念),正投影的成像规律;视图、三视图等概念,三视图的位置和度量规定,一些基本几何体的三视图,简单立体图形(包括相应的展开图)与其三视图的相互转化;课题学习:制作立体模型。
1 Description of content The specific content of this chapter is shown in Table 1 (for reference only). 1.1 Knowledge Structure The knowledge structure in this chapter is shown in Figure 1. 1.2 Textbook Content The main contents of this chapter include: the basic knowledge of projection (including the concept of projection, parallel projection, center projection, orthographic projection), the imaging principle of orthographic projection, the concepts of view and three views, the position and measurement of three views, Some basic geometry of the three views, simple three-dimensional graphics (including the corresponding expansion of the map) and its three views of the mutual conversion; study of topics: the production of three-dimensional model.