Yellow Triangles for Area

The Yellow Area Triangles are an advanced material in the Montessori Geometry curriculum, typically used after the age of 9. They are designed to help children understand through tactile exploration how to calculate the area of ​​a triangle.

What does this material contain?
The set consists of a series of yellow geometric figures, kept in a wooden box, which include:
Equilateral and rectangular triangles of various sizes.
Parallelograms and squares that serve as a reference for transforming shapes.

They have squares drawn on one side

How does it work?
Unlike mechanical learning of formulas, this material allows the child to:

1. Manipulate shapes: The child places the triangles next to each other to see how two identical triangles can form a rectangle or a parallelogram.
2. Deduce the formula: By observing that a triangle occupies half the space of a parallelogram with the same base and height, the child discovers the formula on their own:

AREA = (BASE * HEIGHT) / 2
.
3. Visualize abstract concepts: Transform the concept of "area" from an abstract figure into a tangible surface that can be compared and measured.

This material is part of the category of materials that make the transition from sensory learning to abstract mathematical thinking

This product is a teaching material, not a toy. Not recommended for children under 3 years of age without supervised by an adult.