1. #35

2. VOCABULARY

3. Example 1: Estimating the Area of a Circle Estimate the area of the circle. Use 3 to approximate .

4. Example 2: Estimating the Area of a Circle Estimate the area of the circle. Use 3 to approximate .

5. Example 3 Estimate the area of the circle. Use 3 to approximate . 20 m

6. Example 4: Using the Formula for the Area of a Circle Find the area of the circle. Use for . 22 7

7. Example 5 Find the area of the circle. Use for . 22 7 3 m

8. Example 6 Find the area of the circle. Use for . 22 7 3 1 2 yd _

9. Example 7: Application A drum head has a radius of 18 in. Find the area of the material covering the drum head. use 3.14 for . 18 in.

10. Example 8 The figure shows the dimensions of a standard compact disc. What is the area of the hole in a compact disc? Use 3.14 for and round to the nearest tenth. π

11. Example 9 What is the area of the plastic that is used to make a compact disc? Round to the nearest square centimeter.

12. Example 10 A circular living room has a diameter of 16 ft. Carpeting for the room costs $2.25 per square foot. How much does it cost to put wall-to-wall carpeting in the room? Use 3.14 for π.