空间两点间的距离是以长方体为载体,建立空间直角坐标系,使棱与坐标轴平行,求出对角线长,得空间任意两点间的距离公式.一般地,空间中任意两点P_1(x_1,y_1,z_1),P_2(x_2,y_2,z_2)间的距离公式为P_1P_2= The distance between two points in the space is based on the rectangular parallelepiped as the carrier, and the rectangular coordinate system is set up so that the edge and the coordinate axis are parallel to each other to obtain the diagonal length, and the distance formula between any two points in the space is obtained. Generally, The formula for the distance between P_1 (x_1, y_1, z_1) and P_2 (x_2, y_2, z_2) is P_1P_2 =