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The azimuthal coordinate on the surface of a sphere (theta in spherical coordinates) or on a spheroid (in prolate or oblate spheroidal coordinates). Longitude is defined such ...

The dual of the rhombidodecadodecahedron U_(38) and Wenninger dual W_(76).

The dual of the snub icosidodecadodecahedron U_(44) and Wenninger dual W_(112).

The dual of the icosidodecadodecahedron and Wenninger dual W_(83).

The dual of the inverted snub dodecadodecahedron U_(60) and Wenninger dual W_(114).

The dual of the snub dodecadodecahedron U_(40) and Wenninger dual W_(111).

A line of constant longitude on a spheroid (or sphere). More generally, a meridian of a surface of revolution is the intersection of the surface with a plane containing the ...

An assemblage of faces forming a polyhedron of zero volume (Holden 1991, p. 124).

The north pole is the point on a sphere with maximum z-coordinate for a given coordinate system. For a rotating sphere like the Earth, the natural coordinate system is ...

Am octagonal prims is a prism composed of octagonal faces. The regular right octagonal prism of unit edge length has surface area and volume S = 4(3+sqrt(2)) (1) V = ...