# polyhedra

Noun

- plural form of
*polyhedron*

- (4) On the inscribing of each of the five regular
**polyhedra**in a sphere. - The general theory of
**polyhedra**properly belongs to combinatorial analysis. - Incidentally Pappus describes the thirteen other
**polyhedra**bounded by equilateral and equiangular but not similar polygons, discovered by Archimedes, and finds, by a method recalling that of Archimedes, the surface and volume of a sphere. - Stevinus was the first to show how to model regular and semiregular
**polyhedra**by delineating their frames in a plane. - If we project both
**polyhedra**orthogonally on a plane perpendicular to the axis of the paraboloid, we obtain two figures which are reciprocal, except that corresponding lines are orthogonal instead of parallel.

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