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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 12 · 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 95° and 65°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  15. 15.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  16. 16.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  30. 30.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. 90
  3. Right
  4. 50
  5. 120
  6. 75
  7. 65
  8. 90
  9. 80
  10. 60
  11. 90
  12. 10
  13. 30
  14. 150
  15. Obtuse
  16. 160
  17. 60
  18. 170
  19. 120
  20. 135
  21. 60
  22. 230
  23. 150
  24. 200
  25. 105
  26. 95
  27. 60
  28. 240
  29. Acute
  30. 40
  31. 85
  32. 35
  33. 55
  34. 40
  35. 170
  36. 70
  37. 85
  38. 30
  39. 10
  40. 35

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