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三角形是初中几何的重要内容,也是几何后继学习的基础.在历年中考数学试卷中,以三角形知识为背景的试题占相当比重,而且试题越出越新颖灵活.现以2003年部分省市的中考试题为例加以说明.例1(安徽省中考试题)如图,这些等腰三角形与正三角形的形状有差异,我们把它们与正三角形的接
Triangle is the important content of junior high school geometry, and it is also the basis of geometric succession learning. In the mathematics test papers of the senior high school entrance examination, questions with a background of triangular knowledge account for a considerable proportion, and the questions are more novel and flexible. Now the examination of some provinces and cities in 2003 The exam questions are used as an example to illustrate. Example 1 (Anhui Province Exam Questions) As shown in the figure, these isosceles triangles and equilateral triangles have different shapes. We connect them to the equilateral triangles.