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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 31 · 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.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  10. 10.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  11. 11.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  13. 13.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  14. 14.An angle measures 120°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  15. 15.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  23. 23.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  33. 33.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  34. 34.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  35. 35.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 35
  3. 30
  4. 80
  5. 90
  6. 110
  7. 85
  8. 120
  9. 5
  10. Acute
  11. 100
  12. 120
  13. Obtuse
  14. Obtuse
  15. 5
  16. 145
  17. 130
  18. 150
  19. 110
  20. 120
  21. 40
  22. 85
  23. Acute
  24. 90
  25. 170
  26. 10
  27. 45
  28. 170
  29. 75
  30. 100
  31. 180
  32. 110
  33. Right
  34. Obtuse
  35. 30
  36. 10
  37. 120
  38. 140
  39. 210
  40. 130

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