fix a typo (52.6625 instead of 52.6225) for icosahedron also increase the precision for tetrahedron and icosahedron
fix a typo (52.6625 instead of 52.6225) for icosahedron
also increase the precision for tetrahedron and icosahedron

LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray,LeForgeron/povray