I think you are all off by 2x - A triangle is 1/2 of a square, the LxW=area applies to a square, not a triangle. In order to solve the problem, you must know that it is a right triangle as well.

NEVERMIND, my math skills are better than my reading skills, no one was talking about a triangle except me - everyone else was talking about a rectangle.

I'll guy bury my head in the sand now.