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Polygon is a plane figure or closed curved that made up of line segments. These line segments are called its edges or sides.
They are classified according to the number of side and vertices they have.
Examples of polygons are
triangle - has 3 sides
quadrilateral - has 4 sides
pentagon - has 5 sides
hexagon - 6 sides
heptagon - has 7 sides
octagon - has 8 sides,
nonagon - has 9 sides
decagon - has 10 sides
n-gon - has n-sides.