This article is about the polygon. For other uses, see Square (disambiguation).
Square
A regular quadrilateral
Type
Regular polygon
Edges and vertices
4
Schläfli symbol
{4}
Coxeter–Dynkin diagrams
Symmetry group
Dihedral (D4), order 2×4
Internal angle (degrees)
90°
Properties
Convex, cyclic, equilateral, isogonal, isotoxal
Dual polygon
Self
In Euclidean geometry, a square is a regular quadrilateral, which means that it has four sides of equal length and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length adjacent sides. It is the only regular polygon whose internal angle, central angle, and external angle are all equal (90°), and whose diagonals are all equal in length. A square with vertices ABCD would be denoted ABCD.[1]
^Weisstein, Eric W. "Square". Wolfram MathWorld. Retrieved 2020-09-02.
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