The Tetrahedron, also called the Triangular Pyramid, is the first of the five Platonic Solid shapes in Sacred Geometry. It contains 4 triangular faces, 4 vertices and 6 edges.
The simplest of the Platonic Solids, the Tetrahedron means "with four planes".In the case of a Tetrahedron, the base is also a triangle, so any of the four faces can be considered the base.
Medium: 5 cm edges
Large: 6.5 cm edges