Theory:

As of now, we are aware of triangles and quadrilaterals. We would have seen many triangular and quadrilateral objects in real life.
 
We know that a triangle is a three-sided figure, and a quadrilateral is a four-sided figure.
 
So, can objects not have more than \(4\) sides?
 
No, the objects can have more than \(4\) sides, and such shapes are called polygons.
 
Polygon:
A polygon is a closed figure with more than \(3\) sides.
Let us now look at a few commonly known polygons.
 
Name
Figure
Number of sides
Triangle
29.svg
\(3\)
Quadrilateral
30.svg
\(4\)
Pentagon
31.svg
\(5\)
Hexagon
32.svg
\(6\)
Octagon
33.svg
\(8\)