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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 71 · 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.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  10. 10.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  20. 20.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  21. 21.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  25. 25.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  26. 26.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  28. 28.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 80
  3. 170
  4. 130
  5. 115
  6. 120
  7. 150
  8. 140
  9. 150
  10. Acute
  11. 60
  12. 60
  13. 90
  14. 5
  15. 20
  16. 85
  17. 180
  18. 120
  19. Straight
  20. 90
  21. Acute
  22. 70
  23. 120
  24. 150
  25. Right
  26. 45
  27. 45
  28. Acute
  29. 35
  30. 55
  31. 25
  32. 75
  33. 190
  34. 170
  35. 55
  36. 50
  37. 100
  38. 10
  39. 55
  40. 80

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