A rectangle is a geometric shape with four sides, each of which are straight and parallel to each other. It is characterized by its four right angles, making it a quadrilateral. The opposite sides of a rectangle are equal in length, while the adjacent sides are unequal. This shape is often used in architecture and design due to its symmetry and versatility. In everyday language, a rectangle is commonly referred to as a “long and narrow shape,” but its precise definition includes all shapes with four sides and four right angles.