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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 83 · 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 9 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  14. 14.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  15. 15.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  22. 22.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  23. 23.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  24. 24.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  25. 25.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.An angle measures 165°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. 20
  3. 110
  4. 35
  5. 10
  6. 75
  7. 210
  8. 60
  9. 25
  10. 180
  11. 165
  12. 30
  13. 65
  14. Straight
  15. 230
  16. 75
  17. 50
  18. 45
  19. 180
  20. 105
  21. 120
  22. Acute
  23. 55
  24. Acute
  25. Right
  26. Obtuse
  27. 90
  28. 30
  29. 100
  30. 170
  31. 120
  32. 150
  33. 150
  34. 70
  35. 95
  36. 200
  37. 230
  38. 170
  39. 5
  40. 25

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