如果点A的坐标是(x_1,y_1),点B的坐标是(x_2,y_2),那么线段AB的中点C的坐标是((x_1+x_2)/2,(y_1+y_2)/2).这就是说线段中点的纵、横坐标分别是两端点纵、横坐标的平均数.应用这一线段端点坐标与线段中点坐标的关系,可以简捷地解决一些有关的问题.例1已知,如图1所示的Rt△ABO,AB⊥x轴于点 If the coordinates of point A are (x_1, y_1) and the coordinates of point B are (x_2, y_2), the coordinates of the middle point C of the line segment AB are ((x_1 + x_2) / 2, (y_1 + y_2) / 2) This means that the vertical and horizontal coordinates of the midpoint of the line segment are respectively the average of the vertical and horizontal coordinates of the two ends, and the relationship between the end point coordinates of this line segment and the coordinates of the midpoint of the line segment can be used to solve some related problems simply and conveniently. Know, as shown in Figure 1 Rt △ ABO, AB ⊥ x axis at the point