รูปสองเหลี่ยม

Also known as 2-gon, demisquare, 2-demicube

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".

In the Vinony graph

Vinony's link graph records 140 inbound references to รูปสองเหลี่ยม, and connects out to quadrilateral, parallelogram and trapezoid.

It is catalogued under topics including 2 (number) and Polygons by the number of sides.

Vinony links it to 36 Wikipedia language editions.

Key facts

Polygon.type: Regular polygon
Polygon.edges: 2
Polygon.schläfli: {2}
Polygon.symmetry: D2, [2], (*2•)
Polygon.name: Regular digon
Polygon.image: Digon.svg
Polygon.caption: On a circle, a digon is a tessellation with two antipodal points, and two 180° arc edges.
Polygon.angle: 0° (convex)
Polygon.dual: Self-dual