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rectangle

Quadrilateral with four right angles

Also known as rectangular

Instance of: geometric shape
Subclass of: convex cyclic quadrilateral
, equiangular polygon
, hyperrectangle
+5 more

Overview

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

In Euclidean plane geometry, a rectangle is a rectilinear convex polygon or a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal ; or a parallelogram containing a right angle. A rectangle with four sides of equal length is a square. The term "oblong" is used to refer to a non-square rectangle. A rectangle with vertices ABCD would be denoted as ABCD.

Overview

All data

48 statements · 21% with external sources · numbers in brackets are citations

Dual to: rhombus
Has facet polytope: edge quantity: 4
Members / parts: perimeter
area
Studied by: graph theory
Disjoint union of: list of values as qualifiers list item: square, oblong
Subject lexeme: L326492

On other databases

30 identifiers linking rectangle across the web's reference databases

Data quality

statements

21%

externally sourced

Source last edited August 23, 2026. AIDB refreshes this page daily.

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AIDB. (2026). rectangle (Q209). Retrieved from https://aidb.si/e/rectangle-Q209