一、知识要求掌握网格图形的特征,能利用网格计算图形的面积,能根据要求在网格中正确作图,能用坐标表示出图形平移或旋转后的对应点以及特殊图形的顶点,能用坐标描述图形的形状,能探究出图形变换与图形坐标变化的规律．二、范例赏析 First, the knowledge required to grasp the characteristics of the grid pattern, can use the grid to calculate the area of ​​the graphics, according to the requirements of the correct mapping in the grid, the coordinates can be used to indicate the corresponding point after the graphics translation or rotation and the special graphics vertices, Coordinates can be used to describe the shape of the graph, and the law of the graph change and the graph coordinate change can be explored. Second, sample appreciation