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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 15 · 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 45°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. 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.Two angles of a triangle are 80° and 65°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  11. 11.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  12. 12.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 7 o'clock (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.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  20. 20.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  21. 21.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  23. 23.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  27. 27.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 65°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  31. 31.An angle measures 35°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  32. 32.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  33. 33.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  37. 37.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  38. 38.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 35°. What is the third angle (in degrees)?

Answer key

  1. 135
  2. 150
  3. 85
  4. 5
  5. 35
  6. 65
  7. 65
  8. 35
  9. 90
  10. 55
  11. Obtuse
  12. 120
  13. 200
  14. 30
  15. 55
  16. 80
  17. 150
  18. 40
  19. 70
  20. Acute
  21. 220
  22. Right
  23. 115
  24. 20
  25. 165
  26. Acute
  27. 60
  28. 55
  29. 45
  30. 45
  31. Acute
  32. 50
  33. Obtuse
  34. 180
  35. 200
  36. 160
  37. Acute
  38. 65
  39. 90
  40. 100

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