Usage examples (34)

• Otherwise known as a tetrahedron, a "Caltrop", or to a lesser degree "Ol' Pointy".
• A classic 3D fractal is the Sierpinski tetrahedron, which is a tetrahedron of tetrahedra of tetrahedra, etc.
• Above the tetrahedron is a balloon-shaped figure, apparently drawn into shape by the attraction of the tetrahedron.
• In our space, four equidistant points can be located, the vertices of a tetrahedron, that is, a pyramid having four triangular faces.