Part of the
Atlas of Small Regular Polytopes
Polytopes of Type {4,21,4}
See
other polytopes
of rank 4
Polytopes of this Type
3 in this atlas
{4,21,4}*672
·SmallGroup(672,1265) · universal
{4,21,4}*1344a
·SmallGroup(1344,11703) · universal
{4,21,4}*1344b
·SmallGroup(1344,11703) · universal