Geometrical Shapes with Base are a fundamental part of Montessori materials used to help children explore and understand different 2D and 3D shapes in terms of their characteristics, properties, and relationships to one another. The concept of a "base" in these shapes is often connected to the flat side or bottom edge that helps define the shape's orientation or positioning. The base can also play a role in understanding properties such as area, perimeter, and volume.
In Montessori education, geometric shapes with a base are typically presented to children as part of their sensorial or mathematical exploration, allowing them to develop both visual-spatial awareness and abstract reasoning.