Digon

From Wikipedia, the free encyclopedia

In geometry a digon is a degenerate polygon with two sides and two vertices. In Euclidean geometry, a digon is usually considered to be an impossible object, because its two sides coincide. However, in spherical geometry a digon with distinct sides can be drawn by placing two vertices anywhere on a great circle. If the two vertices are antipodal then the digon is regular.

[edit] See also

• Dihedron - a degenerate polyhedron with 2 vertices.

[edit] References

• Weisstein, Eric W., Digon at MathWorld.
• A.B. Ivanov: Digon at Springer Online Encyclopaedia of Mathematics.