An introduction to Polygons: includes definitions, formulas, examples, exercises, and practice test. Topics include n-gons, diagonals, external and internal angle measures, convex vs concave, and more. Check out the 'preview file' to view content. **Then, to see the answers, download the 'product file' OR visit the mathplane.com or .org site.. Thanks in advance for your support. Proceeds help out teacherspayteachers and mathplane!