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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 912 · 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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  3. 3.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.An angle measures 35°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  6. 6.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  11. 11.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  13. 13.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  14. 14.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  20. 20.An angle measures 80°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  21. 21.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.An angle measures 175°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. Straight
  2. 120
  3. Acute
  4. 155
  5. Acute
  6. 60
  7. 45
  8. 25
  9. 100
  10. 40
  11. Obtuse
  12. 125
  13. Right
  14. 30
  15. 35
  16. 180
  17. 105
  18. 150
  19. 70
  20. Acute
  21. 15
  22. 150
  23. 25
  24. 75
  25. 190
  26. 50
  27. 160
  28. 10
  29. 140
  30. 80
  31. 30
  32. 85
  33. 145
  34. 90
  35. Obtuse
  36. 120
  37. 60
  38. 90
  39. 60
  40. 120

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