From the age of 4 years the working with this material the child will learn that all plane geometrical figures can be constructed from triangles. It allows to evaluate the length of the sides and the angles by simply putting more elements one on top of the other. This material is also very useful in primary school, in particular when dyslexic children first start to study geometry. Through working with the constructive triangles the child learns how to classify the triangles into equilateral, isosceles and scalene or rectangle, acute angle and obtuse angle.
The material consists of a set of five wooden boxes with lids (two rectangular, one triangular and two hexagonal) each containing birch wood triangles in various shapes, painted in five colors. Each triangle - with the exception of the triangles in the rectangular box, no. 2 - has one or more sides highlighted by a black border, which allows the child to independently check for errors when combining the triangles to build complex geometric figures.
Manufacturer: Montessori BF (Trento, Italy)
