Square

A square is a shape with four equal sides and four corners that are all right angles (90 degrees). The diagonals of a square also cross at right angles. The angle between any diagonal and a side of a square is 45 degrees. A square has rotational symmetry of four. It has four lines of regular symmetry. A square with vertices A, B, C and D can be written as ${\displaystyle \square ABCD}$.^[1][2]

A square is a type of rectangle with all sides of equal length. However, while a square is a type of rectangle and rhombus,^[3] the opposite does not need to be true.

A square is also the 2-dimensional surface of a cube.

1. ↑ "List of Geometry and Trigonometry Symbols". Math Vault. 2020-04-17. Retrieved 2020-09-02.
2. ↑ Weisstein, Eric W. "Square". mathworld.wolfram.com. Retrieved 2020-09-02.
3. ↑ "Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid, Parallelogram". www.mathsisfun.com. Retrieved 2020-09-02.