what is an icosahedron
In geometry, an icosahedron (/ËaÉªkÉsÉËhiËdrÉn, -kÉ-, -koÊ-/ or /aÉªËkÉsÉËhiËdrÉn/) is a polyhedron with 20 faces. The name comes from Greek Îµá¼´ÎºÎ¿ÏÎ¹ (eÃ­kosi), meaning 'twenty', and á¼Î´ÏÎ± (hÃ©dra), meaning 'seat'. The plural can be either icosahedra (/-drÉ/) or icosahedrons.