midpoint formula

中点公式 连接两点$P_1(x_1,y_1,z_1)$和$P_2(x_2,y_2,z_2)$的线段的中点坐标为$\left(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}, \frac{z_1+z_2}{2}\right)$。

CSCA math glossary term

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