Assertion: polyhedron's element | /r/HasProperty | vertex
Facets:
Source sentences:
text: These can be defined as partially ordered sets whose elements are the vertices, edges, and faces of a polyhedron.
text: The elements of an abstract polyhedron are its body (the maximal element), its faces, edges, vertices and the null polytope or empty set.
text: It is a connected and closed figure, composed of lower-dimensional polytopal elements: vertices, edges, faces (polygons), and cells (polyhedra).