If are projections of on a given line or plane, then is the projection of the segment on the given line or plane.
Distance between Two Points in Space:
The distance between the points & is given by
Distance of from origin is given by .
If are projection of on -axes, then respectively.
Given and be two points in space. Then
Given be a point in space, Then its distance from origin is
Let are projections of on and -axes respectively, then