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在数学中,当问题所给的对象不能进行统一研究时,我们常常需要根据研究对象性质的差异,按照一定的标准,把有关问题转化为几个部分或几种情况,然后逐个加以解决,最后总结得出结论,这种数学思想叫分类思想.几何图形中引起分类的因素很多,下面举例加以说明.一、图形中要素未明确特殊三角形(等腰三角形、直角三角形)中要素没有明确,例如等腰三角形中底或腰不明确,直角三角形中直角不明确;特殊四边
In mathematics, when the object of the problem can not be unified research, we often need to be based on the differences in the nature of the object of study, according to certain standards, the relevant issues into several parts or several situations, and then one by one to be resolved, and finally Summarized concluded that this mathematical thinking is the classification of ideas.Geometry caused by the classification of many factors, the following examples to illustrate.First, the elements of the graphic is not clear The special triangle (isosceles triangle, right triangle) elements are not clear, for example Isometric triangle in the end or waist is not clear, right-angled triangle right angle is not clear; special four sides