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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 424 · 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 10°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  6. 6.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  11. 11.An angle measures 70°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  12. 12.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  17. 17.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 75°. 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.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.An angle measures 100°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  29. 29.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  30. 30.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?

Answer key

  1. 80
  2. 135
  3. 130
  4. 90
  5. 120
  6. Acute
  7. 75
  8. 120
  9. 30
  10. 30
  11. Acute
  12. 45
  13. 105
  14. 160
  15. 150
  16. 60
  17. Straight
  18. 60
  19. 100
  20. 165
  21. 60
  22. 45
  23. 15
  24. 70
  25. 10
  26. Obtuse
  27. 65
  28. 65
  29. Right
  30. 30
  31. 75
  32. 85
  33. 95
  34. 135
  35. 85
  36. 60
  37. 105
  38. 5
  39. 5
  40. 180

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