Digon

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Digon
Digon.svg
Rank2
TypeRegular
SpaceSpherical
Info
Coxeter diagramx2o
Schläfli symbol{2}
SymmetryI2(2), order 4
Elements
Vertex figureDyad, length 0
Edges2
Vertices2
Measures (edge length 1)
Angle
Central density1
Euler characteristic0
Related polytopes
DualDigon
Properties
ConvexYes
OrientableYes

A digon is a polygon with two sides. It is degenerate if embedded in Euclidean space, as its edges coincide. It can however be thought of as a tiling of the circle. In two-dimensional or higher spherical space, it can form a lune such as the ones making up a hosohedron.

It is the only two-dimensional ditope and hosotope. It is also the two-dimensional demihypercube.