digon
nounUK /ˈdaɪɡən/ · US /ˈdaɪɡən/
Etymology From di- (prefix meaning ‘two’) + -gon (suffix forming the names of plane figures containing a given number of angles).
1
Geometry, Mathematics, Sciences A polygon having two edges and two vertices.
- 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?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:
2
Graph theory, Mathematics, Sciences A pair of parallel undirected edges in a multigraph.
3
Graph theory, Mathematics, Sciences A pair of antiparallel edges in a directed graph.
- Derived terms
- digonal
- Coordinate terms
- monogon · digon · trigon · tetragon · pentagon · hexagon · heptagon · octagon · nonagon · decagon · undecagon · dodecagon · see also Category:English terms suffixed with -gon