oktaedrisessä

Oktaedris is a term derived from the Greek words "okta," meaning eight, and "edra," meaning face. It refers to a polyhedron with eight faces. The most well-known example of an oktaedris is the cube, which has six square faces, but there are other oktaedris shapes as well. For instance, a regular octahedron has eight equilateral triangular faces, and it is one of the five Platonic solids. Oktaedris shapes are studied in geometry and crystallography, where they often appear in the structure of crystals. The term can also be used more generally to describe any polyhedron with eight faces, regardless of their shape or symmetry.