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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 25 · 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 30°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  8. 8.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 25° and 150°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  19. 19.An angle measures 100°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.An angle measures 50°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 80
  3. 130
  4. 100
  5. 110
  6. 55
  7. Right
  8. 5
  9. 15
  10. 90
  11. 130
  12. 105
  13. Straight
  14. 150
  15. 5
  16. 25
  17. 45
  18. 60
  19. Obtuse
  20. 55
  21. 60
  22. 10
  23. 145
  24. 150
  25. 85
  26. 80
  27. 120
  28. Acute
  29. 60
  30. 75
  31. 70
  32. 150
  33. 120
  34. 90
  35. 125
  36. 65
  37. 140
  38. 180
  39. 120
  40. 165

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