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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 590 · 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 75°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  8. 8.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  17. 17.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  18. 18.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  22. 22.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  23. 23.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  29. 29.An angle measures 80°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  30. 30.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  31. 31.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 45° and 95°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 105
  2. 75
  3. 70
  4. 20
  5. 5
  6. 30
  7. 35
  8. Obtuse
  9. 150
  10. 120
  11. 20
  12. 40
  13. 120
  14. 220
  15. 75
  16. 190
  17. Acute
  18. 10
  19. Straight
  20. 85
  21. 90
  22. Obtuse
  23. 60
  24. 70
  25. 180
  26. 110
  27. 170
  28. 10
  29. Acute
  30. Acute
  31. 90
  32. 65
  33. 90
  34. 150
  35. 40
  36. 25
  37. 65
  38. 120
  39. 180
  40. 25

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