digon

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English[edit]

A digon with an internal area (the green portion) can be depicted on the surface of a sphere if its vertices are antipodal (on opposite sides of the sphere). On a flat surface, a digon would look like a line.

Etymology[edit]

di- +‎ -gon.

Pronunciation[edit]

  • Hyphenation: di‧gon

Noun[edit]

digon ‎(plural digons)

  1. (geometry) A polygon having two edges and two vertices.
    • 2013, Brent Davis; Moshe Renert, The Math Teachers Know: Profound Understanding of Emergent Mathematics, New York, N.Y.; Abingdon, Oxon.: Routledge, ISBN 978-1-415-85843-4, page 102:
      They [the students] also came upon new and unusual mathematical figures: the digon, a two-sided polygon on a spherical space, and the apeirogon, an open polygon with infinitely many sides  []. All these discoveries brought up even more questions. Is a circle a polygon? What makes an octagon an octagon – its eight vertices, its eight sides, or both? Can a polygon cross itself? Does a polygon need to be closed?
  2. (graph theory) A pair of parallel undirected edges in a multigraph.
  3. (graph theory) A pair of antiparallel edges in a directed graph.

Synonyms[edit]

Translations[edit]

External links[edit]

Anagrams[edit]


Esperanto[edit]

Noun[edit]

digon

  1. accusative singular of digo

Welsh[edit]

Etymology[edit]

EB1911 - Volume 01 - Page 001 - 1.svg This entry lacks etymological information. If you are familiar with the origin of this term, please add it to the page per etymology instructions. You can also discuss it at the Etymology scriptorium.

Pronunciation[edit]

  • (North Wales) IPA(key): /ˈdɨɡɔn/
  • (South Wales) IPA(key): /ˈdiɡɔn/

Adverb[edit]

digon

  1. enough, sufficient

Mutation[edit]

Welsh mutation
radical soft nasal aspirate
digon ddigon nigon unchanged
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.