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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 866 · 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 140° and 100°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  14. 14.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  17. 17.An angle measures 15°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  18. 18.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  20. 20.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 55° and 55°. What is the third angle (in degrees)?
  32. 32.An angle measures 155°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 120
  2. 30
  3. 35
  4. 90
  5. 55
  6. 150
  7. 150
  8. 35
  9. 30
  10. 155
  11. 90
  12. 250
  13. Right
  14. 100
  15. 45
  16. 120
  17. Acute
  18. 15
  19. Straight
  20. 15
  21. 120
  22. 80
  23. 85
  24. 5
  25. Acute
  26. 60
  27. 140
  28. 80
  29. 60
  30. 110
  31. 70
  32. Obtuse
  33. 150
  34. 180
  35. 105
  36. 90
  37. 10
  38. 100
  39. 35
  40. 75

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