Assertion: polyhedron's vertex | /r/CapableOf | lie in plane
Facets:
value: in space
type: LOCATION
Source sentences:
text: For each face, if the vertices lie in a plane in space, the third condition is satisfied.
text: all the edges are tangent to the unit sphere, the origin is the center of gravity of the points at which the edges touch the sphere, the faces are flat (i.e. the vertices of each face lie in some plane), but are not necessarily regular.