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NAME ___________________________________________________ DATE _____________________ PERIOD __________

Lesson 2 Homework PracticeArea of Circles

Find the area of each circle. Round to the nearest tenth. 1.

5 cm

2. 17 m

19.6.cm2 907.9 m2

3.

9.2 in.

4. 11.5 yd

265.9 in2 103.9 yd2

5. diameter = 9 kilometers 63.6 k m 2 6. radius = 21 inches 1385.4 i n 2

7. diameter = 19.8 yards 307.9 y d 2 8. radius = 7.3 feet 167.4 c m 2

9. radius = 0.5 centimeter 0.8 c m 2 10. diameter = 6.4 meter 32.2 m 2

11. The top of a pretzel canister has a diameter of 6 cm. What is the area of the top of the canister? Round to the nearest tenth. 28.3 c m 2

12. What is the difference in area between a cookie cut from a cutter that has a diameter of 4 inches and a cookie cut from a cutter with a radius of 3 inches? Round to the nearest tenth. 15.7 i n 2

13. The spray from a rotating sprinkler makes a circle with a 20-foot diameter. What area of a yard does the water from the sprinkler cover? Round to the nearest tenth. 314.2 f t 2

14. A semicircular window has a diameter of 24 inches. Lou wants to insert a laminated sun-block coating that costs $1.50 per square inch to apply. How much will Lou spend to coat the window with sun-block? Round to the nearest cent. $339.29

15. Pizza Palace’s largest pizza box has side lengths of 18 inches. A customer wants to special order a pizza with an area of 300 square inches. Will the pizza fit in one of Pizza Palace’s pizza boxes? Explain. No; the pizza will have a diameter of about 19.5 inches and will not fit in their largest box.

Answers were computed using the π key on a calculator.

Program: Pre-Algebra

Vendor: Aptara

Component: ANC_C12_L2

Grade: AMPDF Pages

Math Accelerated • Chapter 12 Volume and Surface Area

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