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Collinearity ○｜Definition｜1st｜20260715234138-00-⌔

Collinearity - Wikipedia

Collinearity

In geometry, collinearity of a set of points is the property of their lying on a single line.1 A set of points with this property is said to be collinear (sometimes spelled as colinear2). In greater generality, the term has been used for aligned objects, that is, things being “in a line” or “in a row”.

Printed 2026-07-15.

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Footnotes

  1. The concept applies in any geometry Dembowski (1968, pg. 26), but is often only defined within the discussion of a specific geometry Coxeter (1969, pg. 178), Brannan, Esplen & Gray (1998, pg.106) ↩

  2. Colinear (Merriam-Webster dictionary) ↩

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