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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 109 · 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.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  5. 5.An angle measures 70°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  6. 6.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  10. 10.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  19. 19.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  20. 20.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  25. 25.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.An angle measures 175°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  27. 27.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  38. 38.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  39. 39.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?

Answer key

  1. 55
  2. 180
  3. 90
  4. 40
  5. Acute
  6. Acute
  7. 110
  8. 45
  9. 210
  10. Obtuse
  11. 30
  12. 10
  13. 190
  14. 60
  15. Right
  16. 60
  17. 90
  18. Obtuse
  19. Straight
  20. 100
  21. 80
  22. 45
  23. 140
  24. 140
  25. Acute
  26. Obtuse
  27. 55
  28. 15
  29. 50
  30. 60
  31. 65
  32. 105
  33. 145
  34. 20
  35. 90
  36. 130
  37. 25
  38. Acute
  39. 130
  40. 190

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