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1 day ago · In geometry, a tetrahedron ( pl.: tetrahedra or tetrahedrons ), also known as a triangular pyramid, is a polyhedron composed of four triangular faces, six straight edges, and four vertices. The tetrahedron is the simplest of all the ordinary convex polyhedra.
- F = 4, E = 6V = 4 (χ = 2)
- {3,3}
- 4 {3}
- Platonic solid
