Assertion: reeve tetrahedron | /r/HasProperty | polyhedron
Facets:
value: in geometry
type: LOCATION
value: at 0
type: OTHER
Source sentences:
text: In geometry, the Reeve tetrahedron is a polyhedron, in three-dimensional space with vertices at (0, 0, 0), (1, 0, 0), (0, 1, 0) and (1, 1, r) where r is a positive integer.