This document discusses different types of polygons. A polygon is defined as a 2D shape with straight sides. Common polygons include quadrilaterals, pentagons, hexagons, heptagons, octagons, nonagons, and decagons. Polygons can be either regular, meaning all interior angles are equal, or irregular, with unequal interior angles. Examples are provided of regular and irregular pentagons, hexagons, and octagons. Links are included for online activities about identifying polygons and using a geoboard app.
