Assertion: polyhedron's side | /r/HasProperty | the base
Facets:
value: likewise
type: DEGREE
Source sentences:
text: It looks like a three-sided pyramid (where the fourth side is the base).
text: "base" usually denotes the face on which the polyhedron rests on; thus each face may be a base (likewise each side of a triangle may be considered as "base").
text: It looks like a three-sided pyramid (where the fourth side is the base).