中点公式
midpoint formula The coordinates of the midpoint of the line segment $P_1P_2$ in space are $\left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}, \frac{z_1+z_2}{2}\right)
CSCA 数学 考试术语
midpoint formula The coordinates of the midpoint of the line segment $P_1P_2$ in space are $\left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}, \frac{z_1+z_2}{2}\right)
CSCA 数学 考试术语