digonとは 意味・読み方・使い方

語源

From di- (prefix meaning ‘two’) +‎ -gon (suffix forming the names of plane figures containing a given number of angles).

発音

• (Received Pronunciation) IPA: /ˈdaɪɡən/, /ˈdaɪˌɡɒn/
• (General American) IPA: /ˈdaɪɡən/, /ˈdaɪˌɡɑn/
• ハイフネーション: di‧gon

名詞

digon (plural digons)

1. (geometry) A polygon having two edges and two vertices.

   Synonyms: biangle, bigon, (less common) diangle

   • 2013, Brent Davis, Moshe Renert, chapter 6, in The Math Teachers Know: Profound Understanding of Emergent Mathematics, New York, N.Y., Abingdon, Oxfordshire: Routledge, →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)
   1. A pair of parallel undirected edges in a multigraph.
   2. A pair of antiparallel edges in a directed graph.

等位語

• monogon · digon (biangle · bigon) · trigon (triangle) · tetragon (quadrilateral) · pentagon · hexagon · heptagon (septagon) · octagon · nonagon (enneagon) · decagon · undecagon · dodecagon · see also Category:English terms suffixed with -gon

派生語

• digonal

Further reading

• digon on Wikipedia.Wikipedia

アナグラム

• Gondi, doing, doïng, Godin, ODing, Diong, OD'ing, dingo