what is a quadrilateral ? Share with your friends Share 1 Simran .. answered this a quadrilateral is a polygon with four sides (or edges) and four vertices or corners. 1 View Full Answer R. Dhanu answered this hi,a quidrilateral is a polygon with 4 sides 0 Manali Sanghai answered this it is a polygon with four sides thumbs up plzzz 0 Keerthana Krishnan answered this a shape or a figure with four sides 0