the.com/tetrahedron
the simplest possible solid, four triangles refusing to be anything less than perfect
means A solid shape with four triangular faces, four vertices, and six edges — the simplest of the polyhedra.
from From Greek 'tetra-' (four) plus 'hedra' (seat or base), so literally 'four-seated' — a body that sits on four faces. The same '-hedron' anchors its larger cousins, the hexahedron and octahedron, all members of Euclid's family of solids.
- minimum solid
- Fewest faces any 3D shape can have
- self-dual
- Its dual is another tetrahedron
- flame shape
- Plato linked it to fire
- strongest joint
- Rigid frame engineers love for stability
- every vertex
- Touches all three other vertices directly