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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 726 · 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.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  9. 9.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  11. 11.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  32. 32.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  40. 40.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Straight

Answer key

  1. 170
  2. 150
  3. 70
  4. 15
  5. 60
  6. 80
  7. 55
  8. 210
  9. Obtuse
  10. Right
  11. 55
  12. 165
  13. 120
  14. 10
  15. 55
  16. 150
  17. 105
  18. 30
  19. 65
  20. 60
  21. 20
  22. 70
  23. 60
  24. 25
  25. 15
  26. 160
  27. 115
  28. 75
  29. 25
  30. 130
  31. Straight
  32. 55
  33. 170
  34. 110
  35. 180
  36. 80
  37. 160
  38. 150
  39. 80
  40. Acute

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