1. Section Name: Arc Length & Area of Sector
Warm-up
What is the formula for the area of a circle?
What is the formula for the circumference of a circle?
How many degrees are in a circle?
Section Name: Arc Length & Area of Sector

2. The area of the entire circle was: How can we find the area of the shaded sector? The circumference of the entire circle was: How can we find the arc length of the shaded section?

3. Find the area of the sector & the arc length of the shaded region.

4. Find the area of the sector & the arc length of the non-shaded region.

5. Find the area of sector AOB.
115°
20°
50° A B C D E O
Radius: 8

6. Find the arc length of 𝐵𝐶𝐷 .B
20°
Radius: 8
115° O C
50° E D

7. Exit Ticket: Find the arc length of 𝐵𝐴𝐸 .B
20°
Radius: 7
115° O C
50° E D

9. Warm-Up
What fraction would you use if finding arc length or area of the following: AFB= ABC= AED=
Section Name: Arc Length & Area of Sector Application

10. An airplane emits a radar beam that can detect an object up to 10 miles away and covers an angle of 150°. What is the area of the region covered by the radar beam?

11. A clock has a pendulum 22 cm long
A clock has a pendulum 22 cm long. If it swings through an angle of 32°, what is the measure of the arc not traveled by the pendulums swing?

12. You have a quiz NEXT class on arc length and area of sector!
Ask any questions you have today!

14. Section Name: QUIZ & PROJECT TODAY!!!
Warm-Up
How do you know when to use the given angle measure versus when to subtract from 360°?
How do you know when to use area and when to use circumference?
Section Name: QUIZ & PROJECT TODAY!!!

15. Read directions carefully!
PROJECT
Read directions carefully!
I will be hanging some of these up so feel free to add extra drawings/decorations to your project.