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课时一 图形的平移内容提要 1.在平面内 ,将一个图形沿某个方向移动一定的距离 ,这样的图形运动称为平移 .平移不改变图形的形状和大小 ,只改变图形的位置 .2 .图形经过平移 ,对应点所连的线段平行且相等 ;对应线段平行且相等 ,对应角相等 .3.由一些基本图案 (简单图形 )
Classroom translation of lesson time 1. In the plane, moving a graphic along a certain distance in a certain direction, such a graphic motion is called translation. The translation does not change the shape and size of the graphic, only the position of the graphic is changed. After the graphic is translated, the line segment connected to the corresponding point is parallel and equal; the corresponding line segment is parallel and equal, and the corresponding angle is equal. 3. Some basic patterns (simple figure)