If you take a rectangular piece of cardboard, twice as long as it is broad, and cut it in half diagonally, you will get two of the pieces shown in the illustration. The puzzle is with five such pieces of equal size to form a square. One of the pieces may be cut in two, but the others must be used intact.
147.--AN EASY SQUARE PUZZLE.
From Amusements in Mathematics by Henry Ernest Dudeney.
