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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 120 · 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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  6. 6.Two angles of a triangle are 55° and 110°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  8. 8.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  9. 9.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  10. 10.An angle measures 170°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  11. 11.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.An angle measures 130°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  33. 33.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  34. 34.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?

Answer key

  1. 85
  2. 115
  3. 25
  4. 30
  5. Right
  6. 15
  7. 120
  8. Acute
  9. Straight
  10. Obtuse
  11. 70
  12. 50
  13. 30
  14. 130
  15. 60
  16. 80
  17. 90
  18. 100
  19. 220
  20. 5
  21. 15
  22. 5
  23. 120
  24. 145
  25. 60
  26. 220
  27. 55
  28. 100
  29. 85
  30. 40
  31. 90
  32. Obtuse
  33. Obtuse
  34. 150
  35. 35
  36. 70
  37. 170
  38. 35
  39. 10
  40. 85

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