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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 36 · 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.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  6. 6.An angle measures 35°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  13. 13.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  14. 14.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  24. 24.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  25. 25.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  40. 40.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute

Answer key

  1. 120
  2. Right
  3. 25
  4. 75
  5. 35
  6. Acute
  7. 90
  8. 90
  9. 150
  10. 180
  11. 70
  12. Obtuse
  13. Obtuse
  14. 190
  15. 140
  16. 70
  17. 40
  18. 105
  19. 60
  20. 60
  21. 125
  22. 60
  23. 160
  24. Straight
  25. 90
  26. 5
  27. 120
  28. 65
  29. 90
  30. 50
  31. 65
  32. 50
  33. 30
  34. 190
  35. 60
  36. 140
  37. 55
  38. 35
  39. 65
  40. Acute

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