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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 410 · 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 5°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  3. 3.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  4. 4.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  5. 5.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  10. 10.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  14. 14.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  15. 15.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.An angle measures 170°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  39. 39.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  40. 40.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. Right
  3. 75
  4. Acute
  5. 80
  6. 45
  7. 60
  8. 160
  9. 15
  10. Acute
  11. 200
  12. 40
  13. 95
  14. Obtuse
  15. 40
  16. 35
  17. 55
  18. 90
  19. 60
  20. 60
  21. 160
  22. 55
  23. 30
  24. 70
  25. 120
  26. Obtuse
  27. 70
  28. 40
  29. 90
  30. 60
  31. 70
  32. 110
  33. 140
  34. 80
  35. 65
  36. 45
  37. 45
  38. 120
  39. Straight
  40. 155

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