Chapter 11 : Areas Related to Circles
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50. The total angle at the centre of a circle is:
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49. If the diameter of a circle is 70 cm, then radius is:
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48. If the radius of a circle is halved, its area becomes:
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47. The perimeter of a quadrant of radius 7 cm is:
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46. The area of a circle with circumference 62.8 cm is:
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45. The area of a 90° sector of radius 7 cm is:
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44. The arc length of a 90° sector of radius 14 cm is:
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43. The area of a sector with angle 60° and radius 21 cm is:
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42. The perimeter of a semicircle includes:
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41. The area of a circle with diameter 42 cm is:
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40. The circumference of a circle with radius 3.5 cm is:
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39. The area of a circle with radius 3.5 cm is:
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38. The value of π approximately is:
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37. The diameter of a circle is twice its:
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36. A quadrant represents what fraction of a circle?
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35. The region enclosed by two radii and an arc is called:
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34. The curved boundary of a sector is called:
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33. The area of a circle increases when radius is increased by:
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32. The area of a semicircle of diameter 14 cm is:
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31. The radius of a circle whose circumference is 22 cm is:
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30. The area of a circle whose circumference is 44 cm is:
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29. The formula for length of arc is:
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28. The formula for area of sector is:
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27. The area of a sector depends on:
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26. The circumference of a circle of radius 10 cm is:
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25. The area of a circle of radius 10 cm is:
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24. If radius is doubled, circumference becomes:
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23. If radius is doubled, area becomes:
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22. The circumference of a circle of radius r is:
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21. The area of a semicircle is equal to:
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20. The area of a quadrant of radius 28 cm is:
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19. The circumference of a circle of diameter 35 cm is:
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18. The area of a circle of radius 21 cm is:
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17. The perimeter of a circle is also called:
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16. The area of a circle is directly proportional to:
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15. If the circumference of a circle is 132 cm, then its diameter is:
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14. The area of the ring formed by two concentric circles of radii 14 cm and 7 cm is:
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13. The perimeter of a quadrant of radius 14 cm is:
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12. The area of a sector of angle 180° in a circle of radius 7 cm is:
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11. The area of a sector of angle 90° in a circle of radius 14 cm is:
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10. The length of an arc of a semicircle of radius 14 cm is:
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9. The radius of a circle whose area is 154 cm² is:
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8. The area of a circle whose diameter is 14 cm is:
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7. If the diameter of a circle is 28 cm, then its area is:
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6. The circumference of a circle is 88 cm. Its radius is:
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5. The area of a quadrant of radius 14 cm is:
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4. The perimeter of a semicircle of radius 7 cm is:
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3. The area of a semicircle of radius 14 cm is:
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2. The circumference of a circle of radius 14 cm is:
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1. The area of a circle with radius 7 cm is:
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