1. Sector Area and Arc Length

2. Area of a Circle –
A = r2

3. Sector of a Circle
The region bounded by 2 radii & their intercepted arc.
Sector
Also a
sector
Visually, it might remind you of a slice of pizza or a piece of pie.

4. Area of a Sector :
Area of a full circle * the part of the circle your looking at

5. Ex1: Find the area of the small sector shown.

6. Ex. 2: Finding the area of a sector
Find the area of the sector shown below.
Sector CPD intercepts an arc whose measure is 80°. The radius is 4 ft. m A =
• r2
360°

7. Ex3: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o
Ex3: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o. Find the areas of the sectors formed by LRM. II R
50 cm L
150o M I

8. Arc Length What is the circumference of circle A ?
What is the arc length of just BC?

9. Find the length of TBG

10. Assignment