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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 768 · 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 60°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 35°. What is the other 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  15. 15.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  16. 16.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  34. 34.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  35. 35.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 65° and 85°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 30
  2. 40
  3. 60
  4. 90
  5. 30
  6. 160
  7. 90
  8. 55
  9. 105
  10. 90
  11. 180
  12. 65
  13. 115
  14. 85
  15. Obtuse
  16. 135
  17. 30
  18. 160
  19. 155
  20. 180
  21. 60
  22. 120
  23. 100
  24. 60
  25. 110
  26. 200
  27. 70
  28. 60
  29. 35
  30. 100
  31. 200
  32. 60
  33. 150
  34. Right
  35. 40
  36. 220
  37. 60
  38. 50
  39. 30
  40. 120

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