新课程标准下的初中数学教材中 ,删去了原三角形全等部分的知识 ,增加了平移、旋转的内容 ,使得数学更贴近生活 ,解题方法更灵活多变 .为帮助同学们把握好平移、旋转的特征 ,巧妙地利用平移和旋转的知识来解决有关问题 ,本文举例如下 :例 1　如图 1 ,把大小相等的两个矩形拼成L In the junior high school mathematics textbooks under the new curriculum standards, the knowledge of the equal parts of the original triangle was deleted, and the content of translation and rotation was added, making mathematics closer to life, and the problem solving method more flexible and changeable. To help the students grasp the translation well The characteristics of rotation, clever use of the knowledge of translation and rotation to solve the problem, the example of this article is as follows: Example 1 As shown in Figure 1, the two equal-sized rectangles into L