Constructor triangles - fifth box

The sensory game of the fifth constructor triangle box is useful for the discovery and knowledge of plane geometry. Triangles are called constructors because each triangle is used to construct other figures. The box contains one large equilateral triangle, eleven equilateral triangles that are a quarter of the whole and six isosceles octangular triangles. All triangles, with the exception of the large equilateral, have a black line on some of their sides, which is a real guide to the exercise, as new geometric figures are formed by joining the lines on the two sides. The game encourages the discovery of geometric shapes and helps to understand that all plane shapes are made up of two or more triangles, facilitates the learning of the concepts of equivalence and similarity, stimulates the ability to concentrate, refines the sensory perception of sight and helps in the knowledge, classification and memorisation of the various figures.