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学习几何知识不仅要记住一些定义、定理,更要认识图形的性质,特别是在图形变化时,找出变化后图形的特点.发现其规律,利用这些规律解决问题.下面一组题目让我们学习如何寻出图形的特点及变化的规律.例1正方形ABCD与正方形CEFG的位置如图所示,点G在线段CD或CD的延长线上,分别连结BD、BF、FD,得到△BFD.
Learn geometric knowledge not only to remember some definitions, theorems, but also to understand the nature of graphics, especially in the graphics changes, to find out the characteristics of the graphics after the change. Find the rules, the use of these laws to solve the problem. The following set of topics let us Learn how to figure out the characteristics of the graphics and changes in the law.Example 1 square ABCD and square CEFG position as shown, point G in the line segment CD or CD extension line, respectively, link BD, BF, FD, get △ BFD.