TechMathI - 5.2 - Angles of PolygonsPresentation Transcript
Bell Ringer 1. Name all diagonals with an endpoint at vertex B. 2. Name all angles not adjacent to D. 3. Name the polygon. 2x + 2 The perimeter of the parallelogram is 84 feet. 4. Find the length of the base. 4x - 2
Polygon Interior Angles Theorem - the sum of the measures of the interior angles of a polygon with n sides is (n – 2)(180°)
Find the sum of the measures of the interior angles. 7 sides 10 sides 11 sides 9 sides 12 sides 16 sides 20 sides
Polygon Exterior Angles Theorem - the sum of the measures of the exterior angles, one at each vertex is 360°
Interior Angles Exterior Angles ? Exterior Angles of Polygons 180o Exterior angles of a polygon sum to 360o.