坐标与平移关系探秘

• 作 者: 肖冬云
• 出 处: 中学生数理化(七年级数学)(人教版)
• 发表日期: 2007年02期
• 关键词: 平面直角坐标系 图形的 左右平 单位长度 正方向 明智之举 对应点 左平移 移时 编队飞行

在平面直角坐标系中平移图形,实际上是将组成图形的所有的点按同一规则进行平移,但要一个点一个点地平移显然不是明智之举,我们只需将组成图形的关键点进行平移,得到平移后图形的“框架”,再将各关键点按图形的形状连接起来就完成了整个图形的平移,关键点其实就是图形的顶点或拐点．单个点的平移也有其规律,一般分为两步,先左右平移,然后再上下平移．我们以习题6．2中的部分习题为例说明．

Translating a graphic in a Cartesian coordinate system essentially shifts all the points that make up the graph to the same rule, but it’s obviously not a good idea to pan one point at a time, we just have to translate the key points that make up the graph. , Get the “frame” after the translation of the graphics, and then connect the key points according to the shape of the graphics to complete the translation of the entire graphics, the key point is actually the vertex or inflection point of the graphics. The translation of a single point also has its regularity, generally divided into two steps, first left and right translation, and then up and down translation. Let’s take some exercises in exercise 6.2 as an example.