Assertion: polyhedron | /r/HasProperty | self-dual
Facets:
Source sentences:
text: If a polyhedron is self-dual, then the compound of the polyhedron with its dual will comprise congruent polyhedra.
text: If the Schläfli symbol is palindromic, i.e. reads the same forwards and backwards, then the polyhedron is self-dual.
text: If a polyhedron is self-dual, then the compound of the polyhedron with its dual will comprise congruent polyhedra.