Polygon can be defined as a closed figure formed by three or more segments. Polygons can be broken into several categories including:

Quadrilaterals

A quadrilateral is any shape that contains four sides.

Quadrilaterals include several more specific groups including:

Trapezoids - One pair of sides are parallel.

Parallelogram - Two pairs of sides are parallel.

Rectangle - Four right angles.

Rhombus - Four equal sides (all same length).

Square - Four right angles and four equal sides.

Pentagons

5 Sided Figures.

Hexagons

6 Sided Figures.

Octagons

8 Sided Figures.

And more...