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1引言“相似变换”是浙教版《数学》七年级(下)第2章第5节的内容.其主要讲两方面的内容:相似变换的概念和相似变换的性质.其数学本质是:研究变换前后两个图形的不变关系及研究不变关系的方法和观念.其中的核心是:相似变换的思想和方法.它是在小学初步认识图形的“放大”和“缩小”的基础
1 Introduction “Similar Transformation ” is the content of Chapter 5 of Chapter 2 of the Mathematics of the Zhejiang Education Edition (second edition), which mainly focuses on two aspects: the concept of similar transformations and the nature of similar transformations. Is to study the invariant relationship between the two graphs before and after the transformation and the methods and concepts to study the invariant relationship.The core of which is the idea and method of the similarity transformation.It is the first step in the elementary school to recognize the “” and “” Shrink "basis