👉 A quadrilateral with four sides of equal length is called a "quadriphyllous" shape. A quadrilateral is a polygon that has four sides and four angles, making it one of the most basic shapes in geometry. Quadriphyllous shapes are often used in architecture to create various architectural designs like pentagons, hexagons, octagons, etc. They can also be found in natural settings such as the shape of a pond or riverbed. For instance,