Assertion: icosahedron | /r/HasProperty | non-convex polyhedron
Facets:
value: with the same number of vertices
type: OTHER
value: with faces
type: OTHER
Source sentences:
text: Jessen's icosahedron, sometimes called Jessen's orthogonal icosahedron, is a non-convex polyhedron with the same number of vertices, edges and faces as the regular icosahedron.