A polyhedron that is dual to itself. For example, the tetrahedron is self-dual. Naturally, the skeleton of a self-dual polyhedron is a self-dual graph. Pyramids are self-dual, so a wheel graph, which is the skeleton of a pyramid, is a self-dual graph.
Self-Dual Polyhedron
See also
Dual Polyhedron, Self-Dual GraphExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Self-Dual Polyhedron." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Self-DualPolyhedron.html