Assertion: császár polyhedron | /r/HasProperty | no line segment
Facets:
value: between two vertices
type: LOCATION
Source sentences:
text: The tetrahedron and the Császár polyhedron are the only two known polyhedra (having a manifold boundary) without any diagonals: every two vertices of the polygon are connected by an edge, so there is no line segment between two vertices that does not lie on the polyhedron boundary.