I'll try and draw it with text since I can't post pictures right
now.


\
\ \ Walls
\ \________
Lines _\_________
\


If this looks OK you should be able to see that if you connect the
corner of the walls to the intersection of the lines you will get half
the angle.

Anyone know how I can post pictures to APBW without a newsreader?
I'm using Google groups from work right now.