This document defines and explains properties of polygons, including: - Names and number of sides of common polygons like triangles, quadrilaterals, pentagons, etc. - Formulas to calculate the interior angle sum and exterior angle sum of regular polygons based on the number of sides. - Examples of applying the formulas to find interior and exterior angle measures of octagons, decagons, and hexagons. - Instructions for students to practice identifying properties of polygons like the number of sides, interior angle sum, and exterior angle sum.