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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 215 · 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 145°. What is the other angle (in degrees)?
  2. 2.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  3. 3.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  19. 19.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  34. 34.An angle measures 135°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  35. 35.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  36. 36.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. Acute
  3. 90
  4. 110
  5. 165
  6. 75
  7. 155
  8. Straight
  9. 35
  10. 10
  11. 55
  12. 150
  13. 90
  14. 25
  15. 180
  16. 30
  17. 190
  18. 15
  19. Obtuse
  20. 50
  21. 65
  22. 180
  23. 60
  24. 85
  25. 20
  26. 150
  27. 90
  28. 110
  29. 150
  30. 170
  31. 85
  32. 60
  33. 25
  34. Obtuse
  35. Right
  36. 145
  37. 190
  38. 105
  39. 65
  40. 95

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