Square shape: A square also fits the

A square also fits the definition of a rectangle (all angles are 90°), a rhombus (all sides are equal length), a parallelogram (opposite sides parallel and equal in length) and a regular polygon (all angles equal and all sides equal). In geometry, a square is a regular quadrilateral . It has four straight sides of equal length and four equal angles. Squares are special cases of rectangles, which have four equal angles, and of rhombuses, which have four equal sides. Learn what a square is, how to find its area and perimeter, and see examples and games. A square is a regular polygon with four equal sides and angles of 90° each. Learn all four sides of the humble square in this quick guide for everything you need to know about the common shape .