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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 234 · 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.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  4. 4.An angle measures 55°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  5. 5.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  6. 6.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  9. 9.An angle measures 75°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  10. 10.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 25° and 95°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  31. 31.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  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 110° and 50°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?

Answer key

  1. 140
  2. 150
  3. 130
  4. Acute
  5. 150
  6. Acute
  7. 55
  8. 20
  9. Acute
  10. 70
  11. 75
  12. 60
  13. 40
  14. 60
  15. 30
  16. 20
  17. 60
  18. Right
  19. 120
  20. 80
  21. 50
  22. 55
  23. Straight
  24. 5
  25. 120
  26. 65
  27. 25
  28. 90
  29. 70
  30. 25
  31. Obtuse
  32. 75
  33. 200
  34. 45
  35. 140
  36. 30
  37. 50
  38. 70
  39. 60
  40. 180

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