Futility Closet

“Missing Square Puzzle”: Solution

Posted in Puzzles by Greg Ross on May 27th, 2006

http://commons.wikimedia.org/wiki/File:Missing_square_puzzle.svg

Solution to Missing Square Puzzle:

It’s not a true triangle — the hypotenuse is bent just slightly, by about 1/28th of a unit, to permit the deception. If you can’t see the bend, there’s another giveaway: If it were a true triangle, the red and blue pieces would be similar. But the blue triangle has a ratio of 5:2, and the red triangle has the ratio 8:3.

(Image: Wikimedia Commons)