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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 880 · 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.An angle measures 125°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  2. 2.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  13. 13.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  17. 17.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  18. 18.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  21. 21.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  30. 30.An angle measures 15°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 25
  3. 150
  4. 180
  5. 75
  6. 30
  7. 5
  8. 120
  9. 160
  10. Right
  11. 50
  12. 90
  13. Acute
  14. 70
  15. 100
  16. 40
  17. Acute
  18. 35
  19. 90
  20. Straight
  21. 115
  22. 90
  23. 90
  24. 170
  25. 180
  26. 80
  27. 150
  28. 120
  29. 30
  30. Acute
  31. 105
  32. 170
  33. 45
  34. 30
  35. 15
  36. 90
  37. 45
  38. 85
  39. 10
  40. 125

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