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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 683 · 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.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  6. 6.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  16. 16.An angle measures 140°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  17. 17.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  18. 18.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  19. 19.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 30° and 65°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 115
  3. 140
  4. 15
  5. Right
  6. 140
  7. 85
  8. 35
  9. 60
  10. Straight
  11. 135
  12. 130
  13. 75
  14. 95
  15. 70
  16. Obtuse
  17. 165
  18. Acute
  19. 70
  20. 85
  21. 200
  22. 20
  23. 60
  24. 125
  25. 45
  26. 110
  27. 25
  28. 120
  29. 35
  30. 150
  31. 80
  32. 60
  33. 50
  34. 20
  35. 90
  36. 30
  37. 60
  38. 45
  39. 30
  40. 105

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