Types ofprisms

The regular right equilateral prisms are canonical polyhedra whose duals are canonical dipyramids. Canonical prisms have midradius equal to the circumradius of their -gonal faces, i.e.,

Prismsshapes

A general prism is a polyhedron possessing two congruent polygonal faces and with all remaining faces parallelograms (Kern and Bland 1948, p. 28; left figure).

The above figure shows the first few regular right prisms, whose faces are regular -gons. The 4-prism with unit edge lengths is simply the cube. The dual polyhedron of a regular right prism is a dipyramid.

PrismsVR

A right prism is a prism in which the top and bottom polygons lie on top of each other so that the vertical polygons connecting their sides are not only parallelograms, but rectangles (right figure). A prism that is not a right prism is known as an oblique prism. If, in addition, the upper and lower bases are rectangles, then the prism is known as a cuboid.

The regular right prisms have particularly simple nets, given by two oppositely-oriented -gonal bases connected by a ribbon of squares. The graph corresponding to the skeleton of a prism is known, not surprisingly, as a prism graph.

Prismsmeaning

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The algebraic degrees of these areas for , 4, ... are 2, 1, 4, 2, 6, 2, 6, 4, 10, 2, 12, 6, 8, 4, 16, 6, 18, 4, ... (OEIS A089929).