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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 23 · 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.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  8. 8.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  9. 9.Two angles of a triangle are 60° and 80°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 60° and 90°. What is the third angle (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  14. 14.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  15. 15.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  19. 19.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 80° and 70°. 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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  33. 33.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  34. 34.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?

Answer key

  1. 15
  2. 120
  3. 180
  4. 30
  5. 150
  6. 100
  7. 20
  8. Acute
  9. 40
  10. 50
  11. 40
  12. 30
  13. Right
  14. 160
  15. Obtuse
  16. 45
  17. 190
  18. Straight
  19. 180
  20. 60
  21. 30
  22. 15
  23. 75
  24. 55
  25. 145
  26. 90
  27. 150
  28. 65
  29. 80
  30. 200
  31. 5
  32. 140
  33. Acute
  34. 120
  35. 110
  36. 35
  37. 60
  38. 150
  39. 230
  40. 140

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