CHAPTER 11.1Angle Measures in Polygons

Sum of the Measures of the Interior Angles of a Convex Polygon…

(n-2) * 180

CHAPTER 11.2Areas of Regular Polygons

The Measure of the Central Angle of a Regular Polygon:

1/n * 360

(n = the number of sides)

Area Find the area of the regular pentagon.

Step 1: Find the central angle.Step 2: Redraw the Triangle you are working withStep 3: Find the Apothem (use trig!)Step 4: Find the Perimeter (use trig!)Step 5: Use the Area formula for Regular Polygons

Table Activity…then…

HOMEWORKPg. 665: 6-19, 22-25, 29-36

Pg. 672: 9-24