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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 218 · 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 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  3. 3.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  4. 4.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  5. 5.An angle measures 140°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  6. 6.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  7. 7.An angle measures 150°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  8. 8.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  18. 18.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 105°. 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 of a triangle are 85° and 35°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  37. 37.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  38. 38.Three angles meet at a point. Two of them are 110° and 140°. 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?

Answer key

  1. Straight
  2. Right
  3. Acute
  4. 120
  5. Obtuse
  6. 75
  7. Obtuse
  8. 30
  9. 90
  10. 60
  11. 140
  12. 30
  13. 60
  14. 110
  15. 20
  16. 50
  17. 120
  18. Acute
  19. 5
  20. 75
  21. 60
  22. 60
  23. 85
  24. 70
  25. 40
  26. 90
  27. 150
  28. 75
  29. 130
  30. 105
  31. 150
  32. 90
  33. 150
  34. 5
  35. 100
  36. 55
  37. Obtuse
  38. 110
  39. 35
  40. 180

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