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Geometry
Chapter 8: Area of Regular
Polygons
Name:____________________________
Regular Polygon:
Radius:
Apothem:
Central angle:
FINDING CENTRAL ANGLES
Example 1: Find the measure of a central angle of a regular polygon with 20 sides.
Example 2: Find the given angle measure of the regular dodecagon (12 sides) shown.
a. m ∠TWU
b. m ∠TWX
c. m ∠TWK
d. m ∠UWK
Area of a Regular Polygon
So,
Area =
Example 3: Find the perimeter and area of the regular polygon.
a.
b.
c.
d.
Homework: Worksheet - Area of regular polygons
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