Types of Polygons
A polygon is a closed shape formed by straight lines that only intersect at the ends. The straight lines form the sides of the polygon.
The following are examples of polygons:

The following figures are not polygons:

A regular polygon is a polygon with equal
sides and equal angles.
 |
| Regular polygon |
Some polygons have special names, depending on the number of sides they have.
Number of sides |
Name of polygon |
3 |
Triangle |
4 |
Quadrilateral |
5 |
Pentagon |
6 |
Hexagon |
7 |
Heptagon |
8 |
Octagon |
9 |
Nonagon |
10 |
Decagon |
The following video gives some examples of classifying polygons.
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