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The dual polyhedron of the small rhombidodecahedron and Wenninger model W_(74).

The dual polyhedron of the small rhombihexahedron U_(18) and Wenninger dual W_(86)

The dual polyhedron of the truncated great dodecahedron U_(37) and Wenninger dual W_(75).

A polyhedron with extra triangular faces, given by the Schläfli symbol s{p; q}.

Johnson solid J_(85).

The line segment connecting opposite polyhedron vertices (i.e., two polyhedron vertices which do not share a common face) in a parallelepiped or other similar solid. Also ...

Johnson solid J_(86).

Johnson solid J_(88).

A curve on the surface of a sphere. Examples include the baseball cover, Seiffert's spherical spiral, spherical helix, and spherical spiral.

A spherical shell is a generalization of an annulus to three dimensions. A spherical shell is therefore the region between two concentric spheres of differing radii. The ...