You are given 5 right triangles. You cut one of the triangles in half to get a total of 6 pieces. Arrange these 6 pieces into a square. This puzzle was first introduced by Sam Loyd in 1905. It is still popular today. The “square within a square” solution is the basis for several magic tricks. The Magic Square paradox on this site is one of them. The file has complete masters for printing the puzzle parts. It also has teacher support to help you develop a puzzle wall for you classroom. An example of the math that can be developed is also included. A great supplement for a geometry unit.