论文部分内容阅读
三视图是高中数学新增内容之一.正确作出简单空间图形的三视图,并识别三视图所表示的立体模型是新课标的基本要求.本文拟结合几个具体的例题介绍三视图的两个辅助作图方法——投点连线法与截面法.例1(08高考宁夏卷)一个长方体截去一个角所得多面体的正视图和侧视图如图1所示(单
Three views is one of the new content of high school mathematics.Creating the three views of simple spatial graphics correctly and recognizing the three-dimensional representation of the three-dimensional model is the basic requirements of the new curriculum standard.This paper intends to introduce a few specific examples to introduce two of the three views Auxiliary drawing method - vote connection method and cross-section method. Example 1 (08 college entrance examination Ningxia volume) A rectangular box cut off one corner of the polyhedron front and side view shown in Figure 1 (single