a regular polygon of 4 sides is called a Share with your friends Share 1 Pooja Khanna answered this A regular polygon of 4 sides is called a Square. 0 View Full Answer Nishtha Verma answered this A REGULAR POLYGON OF 4 SIDES IS CALLED A QUADRILATERAL . 0 Veer answered this Quadrilateral 0 Sneha answered this Quadrilateral 1