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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 339 · 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 125°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  6. 6.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  7. 7.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 85° and 80°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  20. 20.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  24. 24.An angle measures 120°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  26. 26.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  27. 27.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  28. 28.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  29. 29.An angle measures 155°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?

Answer key

  1. 55
  2. 135
  3. 160
  4. 150
  5. Obtuse
  6. Obtuse
  7. Right
  8. 70
  9. 50
  10. 75
  11. 5
  12. 30
  13. 60
  14. 155
  15. 15
  16. 75
  17. 65
  18. 145
  19. Straight
  20. 220
  21. 15
  22. 140
  23. 65
  24. Obtuse
  25. 80
  26. Obtuse
  27. Acute
  28. 50
  29. Obtuse
  30. 20
  31. 170
  32. 60
  33. 105
  34. 190
  35. 130
  36. 120
  37. 50
  38. 80
  39. 30
  40. 150

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