# Schönhardt polyhedron

> non-convex polyhedron that cannot be triangulated into tetrahedra without adding new vertices

**Wikidata**: [Q7433347](https://www.wikidata.org/wiki/Q7433347)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Schönhardt_polyhedron)  
**Source**: https://4ort.xyz/entity/sch-nhardt-polyhedron