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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 731 · 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.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  3. 3.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  13. 13.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  14. 14.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  19. 19.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  20. 20.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  23. 23.An angle measures 60°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 190°. What is the third 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.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 105
  2. Straight
  3. 20
  4. 160
  5. 60
  6. 180
  7. 70
  8. 80
  9. 30
  10. 50
  11. 100
  12. 55
  13. Acute
  14. 25
  15. 65
  16. 35
  17. 155
  18. 75
  19. Acute
  20. 75
  21. Right
  22. 145
  23. Acute
  24. 90
  25. 90
  26. 70
  27. 50
  28. 100
  29. 140
  30. Acute
  31. 30
  32. 30
  33. 90
  34. 15
  35. 80
  36. 15
  37. 60
  38. 125
  39. 160
  40. 120

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