1. 11.1-11.2 Review The answers are on the last slide to check when you’re done.

2. 1. What is the sum of the interior angles of a nonagon?

3. 2. What is the sum of the exterior angles of a 32-gon?

4. 3. What is the measure of one interior angle of a regular 20-gon?

5. 4. What is the measure of one exterior angle of a regular pentagon?

6. 5. The measure of one interior angle of a regular polygon is 120 o. How many sides does it have?

7. 6. The measure of one exterior angle of a regular polygon is 45 o. How many sides does it have?

8. 7. The sum of the interior angles of a polygon is 2700 o. How many sides does it have?

9. 8. Solve for x. (x2)o(x2)o (10x + 20) o 150 o (8x) o 140 o 130 o

10. 9. Solve for x.

11. 10. A regular hexagon has a radius of 14 cm. Find its area. Keep your answer in exact, simplest form.

12. 11. A regular nonagon has an apothem of 2 in. Find its area. Round to the nearest tenth at the end.

13. 12. A regular dodecagon (12 sides) has a radius of 6 mm. Find its area.

14. 13. A regular hexagon has a side of 8 cm. Find its area. Keep your answer in exact, simplest form.

15. 14. A regular 20-gon has an area of 150 ft 2. Each side is 5 ft. Find its apothem.

16. 15. A regular hexagon has an apothem of 6 in. Find its radius in exact, simplest form.