All closed figures are polygons.
A polygon is a close figure made by joining the straight line segments, where adjacent line segment intersects each other at only one point.
Hence, the given statement is false.
Given here are some figures.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Classify each of them on the basis of the following.
(a) Simple curve
(b) Simple closed curve
(c) Polygon
(d) Convex polygon
(e) Concave polygon