Polygon Interior Angle Discovery (Part 1 of 2)

Students will derive the formula for the sum of the interior angles of any polygon `\left(n-2\right)180`, and also begin explore regular polygons. This is "Part 1" of a set of activities. See Part 2 (Exterior Angles) Here: https://teacher.desmos.com/activitybuilder/custom/5b86e3104da06f0a475f38bc

By Joel Bezaire