regular tetrahedron

The vertices of a regular tetrahedron minimize the energy in the case of 4 points.

The effect was as though one were looking down at the apex of a regular tetrahedron.

The Lunar system was the simplest, with just four entry points set at the vertices of a regular tetrahedron.

The satellite was regular tetrahedron, 48 cm on each side.

This group is the symmetry group for a regular tetrahedron.

See also the isometries of the regular tetrahedron.

The cells are usually arranged in such a way that the entire kite is also a regular tetrahedron.

Mark point D in a third, orthogonal, dimension a distance r from all three, and join to form a regular tetrahedron.

The latter has the shape of a regular tetrahedron and is isoelectronic with methane.

A regular tetrahedron is the densest configuration for the packing of four equal spheres.