1. GT Geometry
Put CW/HW from
yesterday on the
corner of your desk,
with a pen.

2. Geom Drill 4/9/13
2x-3
Find the
length of the 5x
longer of
the two
parallel 7X+5
sides.

3. REGULAR POLYGON
Describe perimeter
s1 s
s8 2
s7 s3
s6 s5 s4

4. REGULAR POLYGON
Write a formula for the
area s1 s
s8 2
a
s7 s3
s6 s5 s4

5. Find the area of the regular hexagon using formulas
you already know. Important information: Regular
Hexagon, OA is the radius of the circumscribed circle
FA
AB
BC
CD
DE
EF

6. OBJECTIVE
TO STATE AND APPLY
THE FORMULA FOR
THE AREA OF A
REGULAR POLYGON.

7. REGULAR POLYGON
All angles congruent
and all sides
congruent.

8. Vocabulary
Center of a regular
polygon is center of
the circumscribed
circle.

9. Vocabulary
Radius of a regular
polygon is distance
from the center to a
vertex.

10. Vocabulary
Central angle of a
regular polygon is the
angle formed by two
radii drawn to
consecutive vertices.

11. vocabulary
Apothem of a regular
polygon is the shortest
distance from the center
of the polygon to a side.

12. AREA OF A REGULAR POLYGON
A = 1/2(ap)
a: apothem
p:perimeter of the
polygon

13. FIND THE AREA:(exact)
Apothem is
9, figure is
regular

14. FIND THE AREA: (exact)
Radius is 4, figure
is regular

15. FIND THE AREA:
Side is 4, figure
is regular

16. CLASSWORK
 Worksheet 5.6