Regular Tetrahedron Calculator

The regular tetrahedron is one of the five Platonic solids. It's the simplest polyhedron, with the minimum number of faces (4) needed to enclose 3D space.

Key Properties:

• 4 equilateral triangular faces
• 6 edges (all equal length)
• 4 vertices (each meets 3 faces)
• Self-dual: its dual is another tetrahedron
• Dihedral angle: arccos(1/3) ≈ 70.53°

Platonic Solid:

The five Platonic solids are: tetrahedron (4 faces), cube (6), octahedron (8), dodecahedron (12), and icosahedron (20). They're the only convex polyhedra with identical regular polygon faces and same vertices.