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在七年级的数学学习中,我们学习了很多重要的几何概念、定理,它们都是进一步学习几何知识的基础,因此我们有必要进行一番梳理和总结.一、图形的运动图形的运动方式有平移、翻折、旋转.图形的平移包含两要素,一是平移的方向,二是平移的距离.平移不改变图形的形状和大小,经过平移,对应点所连的线段平行(或在同一条直线上)且相等,对应线段平行且相等,对应角相等.1.(2014·湖南邵阳)某数学兴趣小组开展动手操作活动,设计了如图1所示的
In the seventh grade of mathematics learning, we learn a lot of important geometric concepts, theorems, which are the basis for further study of geometric knowledge, so we need to sort out and summarize.First, the movement of graphics graphics The translation includes two elements, one is the direction of translation, and the other is the distance of translation. The translation does not change the shape and size of the graphic, after translation, the lines connecting the corresponding points are parallel (or in the same Line) and equal, corresponding to the line parallel and equal, the corresponding angle is equal .1 (2014 · Shaoyang, Hunan) a mathematical interest group to carry out hands-on activities, designed as shown in Figure 1