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