4face
tetra 4 faces hedra
The link address is: http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/Foldout/Tetrahedron/Files/teGn_nac-flt.pdf
The link address is: http://www.progonos.com/furuti/MapProj/Normal/ProjPoly/Foldout/Tetrahedron/Files/teGn_nac-flt.pdf