1. Area of a circle

2. Part one: Area of a Circle
Formula: A=r2 Ex: What is the area of a circle with a radius of 15 cm?. What is the area of a circle with a diameter of 9 cm. Leave your answer in terms of .

4. Part two: Sectors
Formula: Area of a sector (i.e. piece of pizza) Ex: Find the area of Sector ZOM Z 72 M 20 O

5. Try This:
A circle has a diameter of 8.2 in. What is the area of a sector with a 125° Arc. Round your answer to the nearest tenth.

6. Find the area of a sector with a central angle of 60 degrees and a radius of 10. Express answer to the nearest tenth.

7. Find the area of a sector of a circle with a central angle of 120 degrees and a radius of 8

8. Part three: Area of a segment of a circle.
Definition:
Segment is the shaded part. (i.e. The crust of a pizza)

9. To find the Area of a segment90
Area of a sector −
Area of a triangle =
Area of a segment − =
Area of a segment

10. Ex: Find the area of the shaded region
90°
90° 15