center vertexcenter
midpoint perpendicular
ap12
perimeter
apothem
Practice p619 #14, 16, 19, 20, 32, 33, 47 [21] p626 #11, 14, 17, 18, 21, 23, 24, 35p631 #1, 5, 810
100 in2
1: 120
2: 60
3: 30
4: 90
5: 45
6: 45
7: 60
8: 30
9: 60
103 Area of Regular Polygons
What is a "Regular" Polygon?
Equilateral AND Equiangular
103 Area of Regular Polygons
Radius: Center to Vertex
Apothem: Center to Midpoint
Central Angle
(n-2)180n
360n
454590306090
Trig
Interior Angle Central Angle
(n-2)180n
360n
454590306090
Trig
Interior Angle Central Angle
(n-2)180n
360n
454590306090
Trig
Interior Angle Central Angle
(n-2)180n
360n
454590306090
Trig
Interior Angle Central Angle
ap12A = B ap1
2=
ap12B =
Find the area of the regular polygon with the given apothem a and side length s.
dodecagon, a = 26.1 m, s = 14 m
ap12B =
ap12B =
Find the area of the regular hexagon. Leave your answer in simplest radical form.
6 m
Find the area of the regular triangle. Leave your answer in simplest radical form.
2√ 3 mm
ap12B =
B
ap12B =
Find B, the area of the Base of this pyramid
ap12B =
Practice p632 #1113, 17, 18, 2123, 35, 44, 45
p638 #1, 2
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