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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 227 · 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.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.An angle measures 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  7. 7.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  8. 8.An angle measures 115°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  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 60°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  19. 19.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  20. 20.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  25. 25.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.An angle measures 145°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  31. 31.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  34. 34.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  35. 35.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  39. 39.An angle measures 15°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  40. 40.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?

Answer key

  1. 120
  2. 70
  3. 160
  4. 75
  5. 60
  6. Obtuse
  7. 180
  8. Obtuse
  9. Acute
  10. 70
  11. 65
  12. Straight
  13. 105
  14. 170
  15. 60
  16. 45
  17. 180
  18. 95
  19. Acute
  20. 10
  21. 230
  22. 80
  23. 190
  24. Right
  25. 105
  26. 75
  27. 70
  28. 65
  29. Obtuse
  30. 90
  31. Acute
  32. 10
  33. 65
  34. Obtuse
  35. 60
  36. 30
  37. 10
  38. 180
  39. Acute
  40. 90

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