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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 81 · 40 sums
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The method (Know the totals): Acute < 90°, right = 90°, obtuse between 90° and 180°, straight = 180°. On a straight line: the two angles add up to 180°. In a triangle: the three angles add up to 180°. Around a point: 360°. Clock: each hour mark is 30° apart (360° ÷ 12).

NameDateTime takenScore ___ / 40
  1. 1.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  11. 11.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  12. 12.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  17. 17.An angle measures 130°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  23. 23.An angle measures 75°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  24. 24.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  31. 31.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  32. 32.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  34. 34.An angle measures 150°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  36. 36.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  37. 37.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?

Answer key

  1. 190
  2. 75
  3. 80
  4. 120
  5. 60
  6. 70
  7. 135
  8. 45
  9. 30
  10. 65
  11. Acute
  12. 100
  13. 210
  14. 60
  15. 60
  16. 170
  17. Obtuse
  18. 90
  19. Straight
  20. 140
  21. 115
  22. 90
  23. Acute
  24. 70
  25. 260
  26. 85
  27. 35
  28. 60
  29. 165
  30. 55
  31. Obtuse
  32. 120
  33. 125
  34. Obtuse
  35. Obtuse
  36. Obtuse
  37. 70
  38. 60
  39. 80
  40. 180

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