<a href="https://en.wikipedia.org/wiki/3-simplex" class="extiw" title="en:3-simplex">en:3-simplex</a> family graph in A2 <a href="https://en.wikipedia.org/wiki/Coxeter_plane" class="extiw" title="en:Coxeter plane">en:Coxeter plane</a>
<a href="//commons.wikimedia.org/wiki/User:Tomruen" title="User:Tomruen">Tomruen</a>
<span class="int-own-work" lang="en">Own work</span>