rectangle

Also known as rectangular

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 (360°/4 = 90°); 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 .

AI overview

A rectangle is a four-sided shape where all four corners are right angles (90 degrees), making it one of the most common and useful geometric forms. Rectangles matter because they appear everywhere in the real world—from buildings and windows to screens and pieces of paper—and their simple, predictable properties make them fundamental to mathematics, design, and engineering.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Polygon.name: Rectangle
Polygon.image: Rectangle_Geometry_Vector.svg
Polygon.caption: Rectangle
Polygon.type: quadrilateral, trapezium, parallelogram, orthotope
Polygon.edges: 4
Polygon.symmetry: Dihedral (D2), [2], (*22), order 4
Polygon.schläfli: { } × { }
Polygon.dual: rhombus
Polygon.properties: convex, isogonal, cyclic Opposite angles and sides are congruent

via Wikipedia infobox

Wikidata facts

Image: Prostokat-rectangle.svg

Show 1 more fact

Commons category: Rectangles

Sources (4)

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~12 min read

Article

18 sections

Contents

Characterizations
Classification
Traditional hierarchy
Alternative hierarchy
Properties
Symmetry
Rectangle-rhombus duality
Miscellaneous
Formulae
Theorems
Crossed rectangles
Other rectangles
Tessellations
Squared, perfect, and other tiled rectangles
Unicode
See also
References
External links

{{Infobox Polygon | name = Rectangle | image = Rectangle_Geometry_Vector.svg | caption = Rectangle | type = quadrilateral, trapezium, parallelogram, orthotope | edges = 4 | symmetry = Dihedral (D2), [2], (*22), order 4 | schläfli = { } × { } | wythoff = | coxeter = | area = | dual = rhombus | properties = convex, isogonal, cyclic Opposite angles and sides are congruent }}