distance formula

距离公式 空间中两点$P_1(x_1,y_1,z_1)$和$P_2(x_2,y_2,z_2)$间的距离为$\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}$。

CSCA math glossary term

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