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diagonal

Line segment joining two nonconsecutive vertices of a polygon or polyhedron

Conceptconcept relative directionQ189791

Instance of: concept
, relative direction
Subclass of: line segment
Part of: polygon
, polyhedron

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge. Informally, any sloping line is called diagonal. The word diagonal derives from the ancient Greek διαγώνιος diagonios, "from corner to corner" ; it was used by both Strabo and Euclid to refer to a line connecting two vertices of a rhombus or cuboid, and later adopted into Latin as diagonus.

Overview

All data

17 statements · 24% with external sources · numbers in brackets are citations

Facet of: geometry

On other databases

12 identifiers linking diagonal across the web's reference databases

Data quality

statements

24%

externally sourced

Source last edited August 17, 2026. AIDB refreshes this page daily.

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AIDB. (2026). diagonal (Q189791). Retrieved from https://aidb.si/e/diagonal-Q189791