This is a 44 page Smartboard file covering the Polygon Angle Sum Theorem. The lesson starts out by describing what a polygon is and by naming the most popular ones. The students are introduced to concave, convex, regular, and irregular polygons next. The the students practice naming shapes according to those attributes. Next the lesson introduces the formula to find the sum of the interior angles of a polygon and how to find the measurement of just one angle. This is followed by lots of practice.