Free Images: "bestof:Disphenoid tetrahedron.png en wikipedia 2011 October 19 Obj <pre> OBJ Disphenoid tetrahedron v -1 0 0 v 1 0 0 v 0 1 1 v 0 1 -1 f 1 2 3 f 1 2 4 f 1 3 4 f 2 3 4"