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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 136 · 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.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  13. 13.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  14. 14.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  15. 15.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  16. 16.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  19. 19.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  25. 25.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  26. 26.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  32. 32.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  37. 37.An angle measures 35°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 90
  2. 35
  3. 20
  4. 30
  5. 20
  6. 60
  7. 25
  8. Right
  9. 20
  10. 5
  11. 90
  12. 90
  13. Obtuse
  14. 75
  15. Acute
  16. 80
  17. 55
  18. Straight
  19. 60
  20. 170
  21. 190
  22. 15
  23. 105
  24. 75
  25. Acute
  26. 190
  27. 150
  28. 85
  29. 85
  30. 90
  31. Obtuse
  32. 165
  33. 95
  34. 65
  35. 155
  36. 75
  37. Acute
  38. 120
  39. 180
  40. 120

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