1. GEOMETRY 10.5 Exterior and Interior Angle Measurement Interactions

2. 10.5 Sum of the Exterior Angle Measures of a Polygon Objectives Write a formula for the sum of the exterior angles of any polygon. Calculate the sum of the exterior angles of any polygon, given the number of sides. Write a formula for the measure of each exterior angle of any regular polygon. Calculate the measure of an exterior angle of a regular polygon, given the number of sides. Calculate the number of sides of a regular polygon, given the measure of each exterior angle.

5. Problem 1: Is There a Formula?

6. Collaborate 1-5 (10 Minutes) Together 6-10 --- - - -

7. Problem 2: Regular Polygons Regular polygons have all sides congruent and all angles congruent. Collaborate 1-5 (5 Minutes)

8. Problem 2: Regular Polygons Together 6-9

10. Formative Assessment