EnglishEdit

 
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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.

EtymologyEdit

di- +‎ -gon.

PronunciationEdit

  • IPA(key): /ˈdaɪɡən/, /ˈdaɪɡɒn/
    • (file)
  • Hyphenation: di‧gon

NounEdit

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 Invalid ISBN, 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.

SynonymsEdit

TranslationsEdit

Further readingEdit

AnagramsEdit


EsperantoEdit

NounEdit

digon

  1. accusative singular of digo

WelshEdit

EtymologyEdit

Perhaps ultimately from Proto-Indo-European *h₁én (produce).[1]

PronunciationEdit

  • (North Wales) IPA(key): /ˈdɪɡɔn/
  • (South Wales) IPA(key): /ˈdiːɡɔn/, /ˈdɪɡɔn/

NounEdit

digon m (uncountable)

  1. enough, plenty, a sufficient amount

Derived termsEdit

AdverbEdit

digon

  1. enough, sufficient

MutationEdit

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.

ReferencesEdit

  1. ^ J. Morris Jones, A Welsh Grammar, Historical and Comparative (Oxford 1913), § 196 ii (5).