{|style="float: right; margin: 0 0 1em 1em; width: 22.5em; font-size: 0.86em; line-height: normal; border: 1px solid #CCD2D9; background: #F0F6FA" ! colspan=2 style="padding-top:1.0em; padding-bottom:1.0em;"|Common tridecahedra |- |align=center|120pxSpace-filling tridecahedron |align=center|120pxElongated hexagonal pyramid |- |align=center|120pxHendecagonal prism |align=center|120pxGyroelongated square pyramid |}
{|style="float: right; margin: 0 0 1em 1em; width: 22.5em; font-size: 0.86em; line-height: normal; border: 1px solid #CCD2D9; background: #F0F6FA" ! colspan=2 style="padding-top:1.0em; padding-bottom:1.0em;"|Common tridecahedra |- |align=center|120pxSpace-filling tridecahedron |align=center|120pxElongated hexagonal pyramid |- |align=center|120pxHendecagonal prism |align=center|120pxGyroelongated square pyramid |}
A tridecahedron, or triskaidecahedron, is a polyhedron with thirteen faces. There are numerous topologically distinct forms of a tridecahedron, for example the dodecagonal pyramid and hendecagonal prism. However, a tridecahedron cannot be a regular polyhedron, because there is no regular polygon that can form a regular tridecahedron, and there are only five known regular convex polyhedra.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).