Assertion: tetrahedron's dual | /r/HasProperty | another tetrahedron
Facets:
Source sentences:
text: The tetrahedron is self-dual (i.e. its dual is another tetrahedron).
text: (its dual also is a Tetrahedron); the other 4 occur as two dual pairs (Octahedron-Cube, Dodechedron-Icosahedron).
text: The polyhedral dual of a tetrahedron is another tetrahedron.
text: Then, the dual of a tetrahedron is another tetrahedron.