polygonal mirror
21metalwork — metalworker, n. /met l werrk /, n. objects made of metal. [1840 50; METAL + WORK] * * * Useful and decorative objects fashioned of various metals. The oldest technique is hammering. After с 2500 BC, casting was also used, molten metal being… …
22Polygon — For other uses, see Polygon (disambiguation). Some polygons of different kinds In geometry a polygon (   …
23Quad-edge — A quad edge data structure is a computer representation of the topology of a two dimensional or three dimensional map, that is, a graph drawn on a (closed) surface.OverviewThe quad edge data structure: * represents simultaneously both the map,… …
24architecture — /ahr ki tek cheuhr/, n. 1. the profession of designing buildings, open areas, communities, and other artificial constructions and environments, usually with some regard to aesthetic effect. Architecture often includes design or selection of… …
25arctic — arctically, adv. /ahrk tik/ or, esp. for 7, /ahr tik/, adj. 1. (often cap.) of, pertaining to, or located at or near the North Pole: the arctic region. 2. coming from the North Pole or the arctic region: an arctic wind. 3. characteristic of the… …
26Archimedean solid — In geometry an Archimedean solid is a highly symmetric, semi regular convex polyhedron composed of two or more types of regular polygons meeting in identical vertices. They are distinct from the Platonic solids, which are composed of only one… …
27Tetrahedron — For the academic journal, see Tetrahedron (journal). Regular Tetrahedron (Click here for rotating model) Type Platonic solid Elements F = 4, E = 6 V = 4 (χ = 2) Faces by s …
28Knot (mathematics) — A table of all prime knots with seven crossings or fewer (not including mirror images). In mathematics, a knot is an embedding of a circle in 3 dimensional Euclidean space, R3, considered up to continuous deformations (isotopies). A crucial… …
29Fürth — Infobox German Location Name = Fürth type = Stadt image photo = Fuerth Suedstadt Zirndorf Bridge from Alte Veste f sw.jpg imagesize = image caption = South part of the city, seen from the Alte Veste (Zirndorf) Wappen = Wappen fürth.png lat deg =… …
30Polytope — Not to be confused with polytrope. In elementary geometry, a polytope is a geometric object with flat sides, which exists in any general number of dimensions. A polygon is a polytope in two dimensions, a polyhedron in three dimensions, and so on… …
