Square

A square is a regular quadrilateral, which means that it has four equal sides and four equal angles

Specifications

• In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or 100-gradian angles or right angles).
• It can also be defined as a rectangle in which two adjacent sides have equal length.
• A rhombus with a right vertex angle
• A rhombus with all angles equal
• A parallelogram with one right vertex angle and two adjacent equal sides
• A quadrilateral with four equal sides and four right angles
• A quadrilateral where the diagonals are equal, and are the perpendicular bisectors of each other (i.e., a rhombus with equal diagonals)

Facts

Perimeter:
P = 4\ell

Area:
A = \ell ^{2}

Equation (where x & y are sides):
x^{2}+y^{2}=2