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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 871 · 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 115°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  25. 25.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 25° and 115°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  40. 40.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute

Answer key

  1. 65
  2. 35
  3. 180
  4. 150
  5. 85
  6. 100
  7. 90
  8. 145
  9. 75
  10. 95
  11. 45
  12. 50
  13. 25
  14. 65
  15. 150
  16. 40
  17. 60
  18. Straight
  19. 20
  20. 230
  21. 120
  22. 115
  23. 80
  24. Right
  25. 85
  26. 110
  27. 30
  28. 60
  29. 40
  30. 105
  31. 30
  32. 80
  33. 10
  34. 30
  35. 190
  36. 70
  37. 40
  38. 70
  39. 150
  40. Obtuse

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