Distance between two points in three dimensions

Distance between two points P(x1, y1, z1) and Q(x2, y2, z2) is given by:

where, (x1, y1, z1) (x2, y2, z2) are any two points on the cartesian plane.

Example :

Calculate the Distance between the points (3,4,5) and (6,7,8)

x1=3, y1=4, z1=5, x2=6, y2=7, z2=8