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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 397 · 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 6 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  7. 7.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  9. 9.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  10. 10.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  26. 26.An angle measures 145°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  27. 27.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  28. 28.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  29. 29.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  32. 32.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?

Answer key

  1. 180
  2. 75
  3. 155
  4. Right
  5. 80
  6. Straight
  7. 35
  8. 5
  9. Acute
  10. 130
  11. 170
  12. 150
  13. 70
  14. 140
  15. 65
  16. 60
  17. 10
  18. 45
  19. 230
  20. 70
  21. 180
  22. 150
  23. 90
  24. 105
  25. 90
  26. Obtuse
  27. 95
  28. Acute
  29. 20
  30. 75
  31. Acute
  32. 60
  33. 85
  34. 35
  35. 115
  36. 90
  37. 200
  38. 145
  39. 120
  40. 100

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