论文部分内容阅读
在直角坐标系中,顶点坐标确定了多边形的形状和位置,但往往不能直接求面积,而要先对图形进行“加工”.
In Cartesian coordinates, the coordinates of the vertices determine the shape and position of the polygons, but often you can not directly find the area. Instead, you first “Process ” the shape.