# Pyramid

This material is suitable for children of any school age.

During the lesson, we will be making a pyramid model using a 3D pen. This task is labor-intensive and requires precision and attentiveness. Students will work with the 3D pen while observing safety protocols. Working with a 3D pen does not require special skills or additional tools. It allows the creation of volumetric figures.

The visually impaired student should sit at the first desk of the middle row. It’s better to attach a magnifying glass above the desk so the child can perform and see the main points of the practical work. If the lighting in the classroom is poor, a desk lamp should be placed on the student’s desk.

Question: What is a pyramid?

Answer: A pyramid is a polyhedron that has a polygon base and triangular faces.

Question: What distinguishes the pyramids presented?

Answer: It depends on the polygon at the base of the pyramid. Pyramids can be triangular, quadrangular, and so on.

Question: What is a triangular pyramid?

Answer: A triangular pyramid has a triangle at its base. The lateral faces are triangles.

A development drawing of a triangular pyramid should be made on the board. Using the pyramid’s development for clarity, we begin working on the pyramid model.

Figure 1. Net of a pyramid.

Figure 2. Model of a pyramid made with a 3D pen.

The teacher assists the visually impaired child; the “hand-over-hand” method can be used, making it easier for the student to construct the model. After finishing the construction of the pyramid, a drawing of the triangular pyramid is made on the board.

We carry out tasks related to the pyramid:

- How many vertices does a triangular pyramid have?
- How many faces?
- How many edges?

We write down tasks about the belonging of points to faces and edges.

It’s easier for a visually impaired student to grasp geometric material if they construct the pyramids themselves before starting to study them.

Figure 3. Model of a quadrangular pyramid.

## Conclusion of the Work

To study geometry, students need to learn how to use drawing and measuring tools. Students should work with models of polyhedra and round bodies.