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Tetrahedron

What is the tetrahedron?

The tetrahedron (or triangular pyramid) is one of the 5 regular polyhedra. It has the following properties: Vertex figure: 3.3.3 Faces: 4 Edges: 6 Vertices: 4 Characteristic: 2 More information can be found here: https://en.wikipedia.org/wiki/Tetrahedron