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一、教学目的这一部分教材主要是研究多面体(稜柱、稜錐、稜台和正多面体)的定义、性貭以及表面积和体积的計算。它是在学习了直綫、平面的位置关系的判定、性质等知識之后提出来的。学习这一部分教材时,学生对于空間图形的性貭已經具有初步的认識,并且对于空間想象能力和繪图能力已有一定的基础。这一部分教材如果学习得好,对于学习旋轉体就很容易,因为这两部分教材研究的方法和許多公式都很相似,所以学好这一部分教材非常重要。这一部分教材的教学目的是使学生对多面体、稜柱、稜錐、稜台和正多面体获得明确的概念;理解它們的性貭;掌握它們的表面积和体积公式;能够运用上列知識进行計算,解决有关的实际問題。
First, the purpose of teaching this part of the teaching material is mainly to study the definition of polyhedrons (prismatic, pyramidal, truncated pyramidal, and regular polyhedron), and the calculation of surface area and volume. It was proposed after learning the knowledge of the judgments and properties of straight lines and plane positional relationships. When learning this part of the textbooks, students have a preliminary understanding of the nature of spatial graphics, and have a certain foundation for spatial imagination and drawing capabilities. If this part of the teaching material is well studied, it is very easy to learn about the rotating body, because the method of studying the two parts of the teaching material and many formulas are very similar, so it is very important to learn this part of the teaching material. The purpose of this part of the teaching material is to enable students to obtain clear concepts for polyhedrons, prisms, pyramids, prisms, and regular polyhedrons; to understand their nature; to grasp their surface area and volume formulas; to use the above knowledge to calculate and solve relevant problems. The actual problem.