A variety of mathematics develops skills. First introduction to problem solving. Encourages the recognition of forms. Ideal for creative activities. Set of 42. Tangrams are ancient Chinese geometric puzzles consisting of seven pieces, each of which has three or four sides. Since the sides of these shapes are proportional, tangrams are used to explore many aspects of Geometry. Students use these puzzles to develop problem solving skills, explore and analyze geometric shapes, dimensions, and spatial relationships.