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全等三角形是几何的重要知识,必须切实学好.怎样才能学好它呢?本文谈几点意见,供初二同学学习时参考. 一、深刻理解全等三角形的含义这是学好全等三角形的基础.首先要弄清什么是全等形,《几何》第二册第20页这样定义:能够完全重合的两个图形叫做全等形.完全重合有两层含义:(1)图形的形状相同;(2)图形的大小
Congruent triangles are an important knowledge of geometry and must be really learned. How can we learn it? This article discusses a few points of view for the reference of students in grade two. A. A profound understanding of the meaning of a congruent triangle This is the basis for learning a congruent triangle. First of all, it is necessary to clarify what is the equal form. The definition of “Geometry” in the second volume of the 20th page is that the two graphs that can be completely coincident are called “equal contours”. There are two meanings in the completely overlapping: (1) the shape of the graph is the same; (2) The size of the graphic