It is a polygon that fits the given description.
a closed plane figure with 3 or more line segments is a polygon
is a closed plane figure
It will form a 7 sided heptagon polygon
It is a polygon that is a closed plane figure with 3 or more straight lines.
A polygon is a closed plane figure consisting of straight lines. So a square is a polygon, a pentagon is a polygon. Just draw any closed figure with straight lines and you have a polygon.
It is a polygon