Polygon with 2 sides
Also known as 2-gon · demisquare · 2-demicube
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7 identifiers linking digon across the web's reference databases
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In geometry, a bigon, digon, or a 2-gon, is a polygon with two sides (edges) 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. It may also be viewed as a representation of a graph with two vertices, see "Generalized polygon".