1. 11.6 Area of Regular Polygons March 08, 2012
B
106.03 in.2, 141.31 in.2
E
L
L 211.09 cm2
W
O
R
23.18 ft2
K
HW pg. 765 #6­16, 27­29 1

2. 11.6 Area of Regular Polygons March 08, 2012
11.6 Areas of Regular Polygons
Objectives:
1. To apply area formulas of regular polygons to solve problems.
2. To develop problem-solving skills.
What do we know about regular polygons?
Apothem: is a perpendicular
segment from the center of the
polygon to a side of the polygon.
Area of a Regular Polygon =1/2aP a is the apothem
P is the perimeter
or A = 1/2ans
where n = number of sides
s = length of a side
HW pg. 765 #6­16, 27­29 2

3. 11.6 Area of Regular Polygons March 08, 2012
1. A is about _____
s = 24 cm
a = 24.9 cm
2. Regular nonagon: a = 9.6cm
and
A = 302.4 cm2,
P is about _________
3. Find the shaded area of the regular octagon ROADSIGN.
The apothem measures about 20 cm. Segment GI measures
about 16.6 cm.
HW pg. 765 #6­16, 27­29 3

4. 11.6 Area of Regular Polygons March 08, 2012
11.6 HW pg. 765
#6-16, 27-29
HW pg. 765 #6­16, 27­29 4