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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 772 · 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.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  7. 7.An angle measures 75°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  15. 15.An angle measures 100°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  16. 16.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  17. 17.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  22. 22.An angle measures 120°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  23. 23.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  24. 24.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  25. 25.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  26. 26.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 160°. 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.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  34. 34.An angle measures 115°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  35. 35.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?

Answer key

  1. 55
  2. 10
  3. 55
  4. 30
  5. 20
  6. 90
  7. Acute
  8. 120
  9. 105
  10. 40
  11. 140
  12. 190
  13. 25
  14. 40
  15. Obtuse
  16. Acute
  17. 80
  18. 160
  19. 140
  20. 85
  21. 90
  22. Obtuse
  23. Right
  24. Obtuse
  25. Straight
  26. 65
  27. 60
  28. 15
  29. 90
  30. 100
  31. 65
  32. 80
  33. 180
  34. Obtuse
  35. 115
  36. 50
  37. 35
  38. 80
  39. 145
  40. 95

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