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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 113 · 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 90° and 80°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  3. 3.An angle measures 70°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  4. 4.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  13. 13.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  20. 20.An angle measures 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  21. 21.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  24. 24.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  25. 25.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  26. 26.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  27. 27.An angle measures 125°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  34. 34.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?

Answer key

  1. 10
  2. 60
  3. Acute
  4. 60
  5. 50
  6. 140
  7. 30
  8. 60
  9. 30
  10. 60
  11. 110
  12. 105
  13. Obtuse
  14. 75
  15. 80
  16. 75
  17. 80
  18. 10
  19. 125
  20. Obtuse
  21. 70
  22. 150
  23. 55
  24. Straight
  25. Right
  26. 160
  27. Obtuse
  28. 100
  29. 35
  30. 100
  31. 220
  32. 10
  33. Obtuse
  34. 115
  35. 85
  36. 65
  37. 130
  38. 100
  39. 155
  40. 25

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