The edges of the cuboid ABCDEFGH define the following geometric elements:
the line p,
the line q and
the line r.
The relationships between the elements are:
The line q passes through the points A and D.
Line p passes through point B and is perpendicular to line q.
Line r is parallel to line p and intersects line q at point D.
Substitute the above three geometric elements correctly in to the cuboid and write the relationships between them using symbols.
