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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