**2 ****points****
**

**points**** line
**

**points**** plane
**

**2 lines:
**

if both not parallel (else point-line)

**Line - plane
**

If the line is parallel to the plane, then the distance is the distance of one point to the plane.

**2 planes
**

If both planes are not parallel, then the distance is the distance of one point of a plane to the plane.