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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 579 · 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 of a triangle are 40° and 50°. What is the third angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  3. 3.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  5. 5.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  7. 7.An angle measures 160°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  10. 10.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  11. 11.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  12. 12.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  13. 13.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  14. 14.An angle measures 125°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.An angle measures 140°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  29. 29.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  30. 30.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  31. 31.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. 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 60°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?

Answer key

  1. 90
  2. Right
  3. Obtuse
  4. Straight
  5. 20
  6. 60
  7. Obtuse
  8. 30
  9. 170
  10. Acute
  11. 180
  12. Obtuse
  13. 15
  14. Obtuse
  15. 120
  16. 150
  17. 30
  18. 100
  19. 90
  20. 65
  21. 40
  22. 135
  23. 140
  24. 15
  25. 15
  26. 150
  27. 55
  28. Obtuse
  29. 150
  30. Acute
  31. 90
  32. 20
  33. 120
  34. 110
  35. 120
  36. 200
  37. 180
  38. 160
  39. 120
  40. 80

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