Assertion: polyhedron | /r/HasProperty | finite set of polygons
Facets:
Source sentences:
text: They define a polyhedron to be a finite set of polygons such that each side of a polygon is a side of just one other polygon, such that no non-empty proper subset of the polygons has the same property.
text: A polyhedron is a finite set of polygons such that every side of each belongs to just one other, with the restriction that no subset has the same property.