Skills Practice Workbook - Glencoe

Skills Practice Workbook - Glencoe Skills Practice Workbook - Glencoe

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11–5 NAME DATE PERIOD Skills Practice Circumference of a Circle Find the circumference of each object to the nearest tenth. 1. a round swimming pool 2. a circular top of a 3. the circular base of a with radius 12 feet trampoline with paper weight with 75.4 ft diameter 16 feet diameter 3 centimeters 50.3 ft 9.4 cm 4. a CD with diameter 5. circular garden with 6. circular mirror with 11 centimeters radius 10 feet diameter 4 feet 34.6 cm 62.8 ft 12.6 ft Find the circumference of each circle to the nearest tenth. 7. r � 7 cm 8. d � 20 yd 9. r � 1 m 44.0 cm 62.8 yd 6.3 m 10. d � 6 ft 11. r � 200 ft 12. d � 5 in. 18.8 ft 1256.6 ft 15.7 in. 13. r � 2 m 14. d � 70 ft 15. r � 3 in. 12.6 m 219.9 ft 18.8 in. 16. d � 10 in. 17. r � 19 m 18. d � 35 yd 31.4 in. 119.4 m 110.0 yd Find the radius of each circle to the nearest tenth for each circumference given. 19. 100 m 15.9 m 20. 32 ft 5.1 ft 21. 18 mi 2.9 mi 22. 28 cm 23. 80 in. 24. 25 m 4.5 cm 12.7 in. 4.0 m 25. 75 yd 26. 14 cm 27. 250 ft 11.9 yd 2.2 cm 39.8 ft © Glencoe/McGraw-Hill 65 Geometry: Concepts and Applications

11–6 Area of a Circle NAME DATE PERIOD Skills Practice Find the area of each circle to the nearest hundredth. 1. r � 10 in. 2. r � 18 cm 3. r � 4 mm 314.16 in 2 1017.88 cm 2 50.27 mm 2 4. d � 50 ft 5. d � 6 in. 6. d � 30 m 1963.50 ft 2 28.27 in 2 706.86 m 2 7. C � 31.42 yd 8. C � 131.95 m 9. C � 232.48 ft 78.56 yd 2 1385.51 m 2 4300.92 ft 2 10. r � 1 mi 11. d � 90 m 12. C � 628.32 ft 3.14 mi 2 6361.73 m 2 31,416.07 ft 2 13. d � 300 ft 14. r � 6 in. 15. C � 150.80 m 70,685.83 ft 2 113.10 in 2 1809.64 m 2 A circle has a radius of 10 inches. Find the area of a sector whose central angle has the following measure. Round to the nearest hundredth. 16. 90° 17. 30° 18. 120° 78.54 in 2 26.18 in 2 104.72 in 2 19. 45° 20. 60° 21. 135° 39.27 in 2 52.36 in 2 117.81 in 2 22. 100° 23. 150° 24. 70° 87.27 in 2 130.90 in 2 61.09 in 2 © Glencoe/McGraw-Hill 66 Geometry: Concepts and Applications

11–5<br />

NAME DATE PERIOD<br />

<strong>Skills</strong> <strong>Practice</strong><br />

Circumference of a Circle<br />

Find the circumference of each object to the nearest tenth.<br />

1. a round swimming pool 2. a circular top of a 3. the circular base of a<br />

with radius 12 feet trampoline with paper weight with<br />

75.4 ft diameter 16 feet diameter 3 centimeters<br />

50.3 ft 9.4 cm<br />

4. a CD with diameter 5. circular garden with 6. circular mirror with<br />

11 centimeters radius 10 feet diameter 4 feet<br />

34.6 cm 62.8 ft 12.6 ft<br />

Find the circumference of each circle to the nearest tenth.<br />

7. r � 7 cm 8. d � 20 yd 9. r � 1 m<br />

44.0 cm 62.8 yd 6.3 m<br />

10. d � 6 ft 11. r � 200 ft 12. d � 5 in.<br />

18.8 ft 1256.6 ft 15.7 in.<br />

13. r � 2 m 14. d � 70 ft 15. r � 3 in.<br />

12.6 m 219.9 ft 18.8 in.<br />

16. d � 10 in. 17. r � 19 m 18. d � 35 yd<br />

31.4 in. 119.4 m 110.0 yd<br />

Find the radius of each circle to the nearest tenth for each circumference given.<br />

19. 100 m<br />

15.9 m<br />

20. 32 ft<br />

5.1 ft<br />

21. 18 mi<br />

2.9 mi<br />

22. 28 cm 23. 80 in. 24. 25 m<br />

4.5 cm 12.7 in. 4.0 m<br />

25. 75 yd 26. 14 cm 27. 250 ft<br />

11.9 yd 2.2 cm 39.8 ft<br />

© <strong>Glencoe</strong>/McGraw-Hill 65 Geometry: Concepts and Applications

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