<a href="https://en.wikipedia.org/wiki/Cantellated_2_21_polytope" class="extiw" title="en:Cantellated 2 21 polytope">en:Cantellated 2_21 polytope</a> family polytopes in <a href="https://en.wikipedia.org/wiki/Coxeter_plane" class="extiw" title="en:Coxeter plane">en:Coxeter plane</a> symmetry
<a href="//commons.wikimedia.org/wiki/User:Tomruen" title="User:Tomruen">User:Tomruen</a>
<span class="int-own-work" lang="en">Own work</span>