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

2. Geom Drill 4/23/16
7X+5
2x-3
5x
Find the
length of the
longer of
the two
parallel
sides.

3. Drill Cont
What does it mean to
circumscribe an object?

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

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
EF
DE
CD
BC
AB
FA

6. REGULAR POLYGON
Describe perimeter
s7
s5
s3
s2
s1
s6
s4
s8

7. REGULAR POLYGON
Write a formula for the
area
s7
s5
s3
s2
s1
s6
s4
s8
a

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

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

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

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

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

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

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

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

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

17. CLASSWORK
 Worksheet 5.6