White nylon plastic with a matte finish and slight grainy feel.
About this Product
Put the four pieces together to form an equilateral triangle or a square. This puzzle is based on Dudeney's dissection of a triangle into a square. When completed, the triangle has side length = 2.15 cm and the square has side length = 1.4 cm. Each piece is 3mm (0.3 cm) thick.