Goursat tetrahedron

Imagine you have a shape that looks like a pyramid, but not like any pyramid you've seen before. It's called a Goursat tetrahedron. A tetrahedron is a shape with four sides that are all triangles, and a Goursat tetrahedron is a special kind of tetrahedron.

Now, let's break it down. First, a tetrahedron has four sides made up of triangles, and each side is called a face. When you look at a tetrahedron, you see that it has four vertices, which are the points where the sides or faces meet. So, a tetrahedron basically looks like a pyramid, but instead of having three sides or faces, it has four.

Now, what makes a Goursat tetrahedron special is that all of its faces are triangle-shaped, and each face is an equilateral triangle. That means that all three sides of the triangle are the same length. So, when you look at a Goursat tetrahedron, you can see that it has four equilateral triangular faces, and each face is the same size and shape.

To summarize, a Goursat tetrahedron is a special kind of tetrahedron that has four equilateral triangular faces. It may sound complex, but if you remember what a tetrahedron is and what an equilateral triangle is, then you're well on your way to understanding what a Goursat tetrahedron is!