1. Chapter 11: Measuring Length and Area 11.6.1 Area of Regular Polygons

2. Apothem and Radius  For regular polygons  The Radius is a segment with the center and a vertex as endpoints  The Apothem is a segment with the center as an end point and perpendicular to a side Apothem Radii

3. Find the measure of a Central Angle  For each side, there is a central angle, there for the measure of each central angle is where n is the number of sides Central angle (Isosceles triangle) Apothem is angle bisector Why?

4. Find the measure of each angle 1 2 17ft 16ft 8ft 15ft

5. Find the measure of the apothem 12in 6in 27.5 ⁰ a

6. Homework  p. 765   1 – 13, 47 - 52