Assertion: polyhedron | /r/DefinedAs | geometric object
Facets:
value: often
type: TEMPORAL
value: with flat faces
type: OTHER
value: with straight edges
type: OTHER
Source sentences:
text: A polyhedron (plural polyhedra or polyhedrons) is often defined as a geometric object with flat faces and straight edges (the word polyhedron comes from the Classical Greek πολύεδρον, from poly-, stem of πολύς, "many," + -edron, form of εδρον, "base", "seat", or "face").