May 26, 2015
(11.4) Areas of Regular Polygons and Composite Figures
Objective: To find the area of regular polygons and composite figures.
Why: Many objects contain regular polygons and require knowledge
of how much material is needed to make them.
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
Regular Polygons
1
A= aP
2
r
a
s
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
1. Find the area.
6cm
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
2. Find the area.
4cm
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
3. A regular dodecagon has side length 1.2cm and
r = 2.3cm. Find the area.
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
May 26, 2015
Obj: To find the area of regular polygons and composite figures.
HF:
(HR) (11.4) Pg.812: 10-13, 17, 22, 23