Question 633728
<pre>
{{{drawing(400,4400/13,-3,10,-1,10,

green(line(-2,-1.5,4,3)),
line(0,0,3,0),
line(0,4,0,0),
line(3,0,7,3),
line(7,3,7,7),
green(line(9,3,4,3)),
line(7,7,4,7),

line(3,4,7,7),

green(line(4,3,4,9)),
line(4,7,0,4),
line(3,4,3,0),
line(3,4,0,4),

locate(0,0,A), locate(3,0,R), locate(7,3,G), locate(9,3,y),locate(-1.5,-.5,x),
locate(7,7.5,Q),
locate(3.5,7.5,E), locate(4,9,z), locate(-.4,4.2,P), locate(3.2,4,H)
 



)}}}

The point H has the same coordinate in the x-direction as A, P, and R,
which is 5.

The point H has the same coordinate in the y-direction as G, Q, and R,
which is 3.

The point H has the same coordinate in the z-direction as P, Q, and E,
which is 4.

Therefore the coordinates of H is the ordered triple (5,3,4)

Edwin</pre>