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初中数学的几何部分,常常因为图形变化多端,方法多种多样而被称为数学中的变形金刚,也是学生学习中的难点.但变形金刚也不是无敌的,笔者认为每一道几何题目背后都有着一定的法则和规律,每一类题都有着相似的解题思想,这种思想的集中体现便是模型.因此,在教育教学中对基本模型意识的渗透和培养颇有必要.下面以2017年丽水市学业考试第16题的自然解法为例,一起欣赏立足基本模型的试题解法.
The geometric part of junior high school mathematics is often called the transformers in mathematics due to the variety of graphics and diverse methods, which is also a difficult point for students to learn.But Transformers are not invincible, I think behind every geometric problem are Certain rules and laws have similar problem-solving ideas for each kind of question, and the concentrated expression of this kind of thinking is a model, so it is necessary to infiltrate and raise awareness of basic model in education and teaching. Lishui City, the first 16 natural examination, as an example, enjoy together based on the basic model of the test solution.