#"distance between two points can be calculates using :"#
#P_1=(x_1,y_1,z_1)" "P_2=(x_2,y_2,z_2)#
#Delta s=sqrt((x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2#
#Delta s=sqrt((7-7)^2+(-24+46)^2+(7-1)^2)#
#Delta s=sqrt(0+22^2+6^2)#
#Delta s=sqrt(484+36)#
#Delta s=sqrt 520#
#Delta s=22.8 " "unit#