A Polygon is a closed figure formed by $3$ or more line segments.
- That means a polygon can have as few as three sides. Or it can have 10 billion. Whatever.
A polygon has both sides and interior angles. The number of sides equals the number of angles.
A Regular Polygon is one in which all sides are equal and all interior angles are equal.
The Perimeter of a polygon is the sum of the lengths of all its sides.
The Area of a polygon is the total two-dimensional space taken up by it.

Names of Common Polygons