Ken's POTW
Two Lines and a Table

Find the perpendicular distance between the two parallel lines:
y=mx+a and y=mx+b in terms of a, b,
and m.

Put a round table into a (rightangled) corner so that the table top
touches both walls and the feet are firmly on the ground. If there
is a point on the perimeter of the table which is 10 inches from one
wall and 5 inches from the other, what is the diameter of the table?
Source:
1. Original, Ken's POTD 3/24/94
2. Internet newsgroup rec.puzzles, Ken's POTD 5/4/94
Solution
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