Polygons https://www.youtube.com/watch?v=IaoZhhx_I9s Polygon A polygon is a closed figure that is the union of line segments in a plane. A polygon has three or more sides. A polygon has the same number of angles as sides.Polygons can be classified as either convex or concave.A polygon is convex if no line that contains a side of the polygon contains a point in … [Read more...] about Polygons