SpeedOfLight is the speed of light in a vacuum, a universal constant.

StefanConstant is the Stefan\[Dash]Boltzmann constant, a universal constant of proportionality between the radiant emittance of a black body and the fourth power of the ...

ThomsonCrossSection is the Thomson cross section, an atomic constant.

Area[polygon] gives the area of polygon polygon, when the edges of polygon have unit length.

CircumscribedRadius[polygon] gives the radius of a circumscribed circle of polygon polygon, when the edges of polygon have unit length.

Decagon is a regular polygon with ten edges, for use with polytope functions.

Digon is a regular polygon with two edges, for use with polytope functions.

Dodecagon is a regular polygon with twelve edges, for use with polytope functions.

Faces[polytope] gives a list of the faces of polytope.

Heptagon is a regular polygon with seven edges, for use with polytope functions.