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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 502 · 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 40°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  9. 9.An angle measures 155°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  10. 10.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  16. 16.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  17. 17.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  32. 32.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 85°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  38. 38.An angle measures 120°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  39. 39.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?

Answer key

  1. 50
  2. 60
  3. 135
  4. 70
  5. 85
  6. 60
  7. 90
  8. Right
  9. Obtuse
  10. 40
  11. 35
  12. 25
  13. 90
  14. 45
  15. 120
  16. Acute
  17. 80
  18. 140
  19. 55
  20. 180
  21. 105
  22. 30
  23. 50
  24. 30
  25. 10
  26. 130
  27. 190
  28. 130
  29. 130
  30. 120
  31. 150
  32. Acute
  33. 60
  34. 35
  35. 165
  36. 65
  37. 90
  38. Obtuse
  39. 170
  40. 5

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