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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 116 · 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  7. 7.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  22. 22.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  24. 24.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  38. 38.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. 45
  3. 90
  4. 80
  5. 120
  6. 15
  7. Obtuse
  8. 30
  9. 110
  10. 25
  11. 80
  12. 60
  13. 105
  14. 30
  15. 135
  16. 140
  17. 125
  18. 240
  19. 160
  20. 50
  21. Right
  22. 140
  23. Straight
  24. 45
  25. 35
  26. 145
  27. 60
  28. 170
  29. 30
  30. 20
  31. 150
  32. 70
  33. 60
  34. 60
  35. 125
  36. 35
  37. 50
  38. Acute
  39. 60
  40. 40

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