You can read a bit about the companyâs history in this article, but I canât point you to the companyâs web site for the simple reason that it doesnât have one. Yes, as amazing as this is, here in mid-2009 Arca Swiss lacks a web site, one of the few companies of any size in the photographic industry without one.
A pyritohedron is a dodecahedron with pyritohedral (T h) symmetry. Like the regular dodecahedron, it has twelve identical pentagonal faces, with three meeting in each of the 20 vertices. However, the pentagons are not constrained to be regular, and the underlying atomic arrangement has no true fivefold symmetry axes.
Properties of a Dodecagon. Given below are some facts about dodecagon: 1  The total interior angle of a 12 sided polygon is = (12 - 2) 180 degrees = 1800 degrees. 2  The internal angle at each vertex of an regular dodecagon is equal to = $\frac{1800}{12}$ = 150 degrees. 3  While the exterior angle at a single vertex is = $\frac{360}{12}$ = 30 degrees.