Notes—Section 10.3 Area of Regular Polygons Regular Polygons: All __________ congruent, all _____________ congruent. Common Examples: Square Equilateral Triangle Regular Hexagon

r

45

r

a

r 30 a

a

30

45

apothem (a) =

60

 distance from _________

60

radius (r) = distance from ________ to _____________________

to _________________ Area of a Regular Polygon

Find the missing information: 1.)

r

a

2.)

r 3 2 a  _____ side length = ______ P  _____ A  _____

r

a

3.)

r

a

r  _____ a3 side length = ______ P  _____ A  _____

4.)

r

a

6.)

r  _____

r

a

r  _____ a  _____ side length = ______ P6 3 A  _____

5.)

a4 3 side length = ______ P  _____ A  _____

r  _____ a4 side length = ______ P  _____ A  _____

r

a

r  _____ a  _____ side length = ______ P  24 A  _____

Example: Find the area of each figure below. 7.)

8.)

6.1 ft 7.2 ft

9.)

10.)