学习《轴对称》一章,应从以下几个方面感悟分类讨论思想.一对称轴的基本类型由轴对称图形的概念可知,判断图形是否为轴对称图形,关键在于能否找到对称轴.那么,从哪里人手探寻对称轴呢?为了回答这个问题,先来看一个例子.例1试找出图1所示的每个正多边形的对称轴的条数,并就正n边形的对称轴的条数作一个猜想.解析:对称轴的条数,从左至右依次为3,4,5,6,7,8.由此可以猜想:正n边形有n条对称轴.n为奇数时,每一条对称轴都经过 Learn from the “Axisymmetric” chapter, the following aspects should be sentiment understanding of the classification discussion.A symmetric axis of the basic types of Axisymmetric graphics from the concept we can see to determine whether the graph is an axisymmetric graphics, the key lies in the ability to find the axis of symmetry.So, In order to answer this question, let’s look at an example.Example 1 Try to find out the number of symmetry axes of each regular polygon shown in Figure 1, and in terms of the symmetry axis of a regular n-polygon Analysis of a number: the number of axes of symmetry, from left to right are 3, 4, 5, 6, 7, 8. It can be speculated that: positive n-sided n-axis symmetry n is odd Each axis of symmetry passes