Isometric SystemRoger Weller, geology instructor
wellerr@cochise.edu
copyright 2008-R.Weller
wooden crystal model
tetrahexahedron (hk0)
model #04-2
A cube is a hexahedron; each of the cube
faces consists of 4 faces
(hence the tetra).

Photo is copyright free for non-commercial educational
uses.
Just credit photo to R.Weller/Cochise College.