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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 358 · 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 11 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  10. 10.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  12. 12.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  13. 13.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 60° and 80°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  28. 28.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  29. 29.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  30. 30.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  31. 31.An angle measures 20°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  32. 32.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  38. 38.An angle measures 45°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  39. 39.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  40. 40.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 85
  3. 70
  4. 5
  5. 140
  6. 180
  7. 95
  8. 155
  9. Acute
  10. 140
  11. 65
  12. Acute
  13. Straight
  14. 60
  15. 60
  16. 105
  17. 40
  18. 40
  19. 110
  20. 25
  21. 30
  22. 5
  23. 80
  24. 120
  25. 75
  26. 120
  27. 75
  28. Right
  29. 80
  30. Obtuse
  31. Acute
  32. 30
  33. 80
  34. 10
  35. 15
  36. 10
  37. 55
  38. Acute
  39. Obtuse
  40. 110

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