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A regular polygon can also be represented by its Coxeter-Dynkin diagram, , and its uniform truncation , and its complete truncation . The graph represents Coxeter group I 2 (n), with each node representing a mirror, and the edge representing the angle π/ n between the mirrors, and a circle is given around one or both mirrors to show which ones ...
In geometry, a polygon is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain. These segments are called its edges or sides, and the points where two of the edges meet are the polygon's vertices (singular: vertex) or corners.
In geometry, a bigon, [1] digon, or a 2-gon, is a polygon with two sides and two vertices.Its construction is degenerate in a Euclidean plane because either the two sides would coincide or one or both would have to be curved; however, it can be easily visualised in elliptic space.
In geometry, a vertex configuration is a shorthand notation for representing a polyhedron or tiling as the sequence of faces around a vertex.It has variously been called a vertex description, [1] [2] [3] vertex type, [4] [5] vertex symbol, [6] [7] vertex arrangement, [8] vertex pattern, [9] face-vector, [10] vertex sequence. [11]
Polygon names and miscellaneous properties; Name Sides Properties monogon: 1: Not generally recognised as a polygon, [18] although some disciplines such as graph theory sometimes use the term. [19] digon: 2: Not generally recognised as a polygon in the Euclidean plane, although it can exist as a spherical polygon. [20] triangle (or trigon) 3
[1] [3] (Here a "polygon" should be viewed as including the 2-dimensional region inside it.) Other names for a polygonal face include polyhedron side and Euclidean plane tile. For example, any of the six squares that bound a cube is a face of the cube. Sometimes "face" is also used to refer to the 2-dimensional features of a 4-polytope.
In geometry, a dissection problem is the problem of partitioning a geometric figure (such as a polytope or ball) into smaller pieces that may be rearranged into a new figure of equal content. In this context, the partitioning is called simply a dissection (of one polytope into another).
[1] [2] Conway and Hart extended the idea of using operators, like truncation as defined by Kepler , to build related polyhedra of the same symmetry. For example, tC represents a truncated cube , and taC , parsed as t ( aC ) , is ( topologically ) a truncated cuboctahedron .
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