A square is a four-sided shape. All sides of a square are equal in length. The opposite sides are parallel to each other. Squares have the same internal angles, which are equal to \(90^\circ\). This implies that a square has four right angles. As a quadrilateral, its internal angles sum up to \(360^\circ\). A square is also a regular polygon because it is both equilateral (all sides are equal) and equiangular (all angles are equal).

## Perimeter of Square

The perimeter of a square is the sum of its sides. We know that a square has equal sides. Therefore, if one side is \(s\), the perimeter must be \(4s\).