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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 613 · 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.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  3. 3.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.An angle measures 80°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  15. 15.An angle measures 85°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  16. 16.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.An angle measures 50°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  21. 21.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  24. 24.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  25. 25.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  26. 26.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 60° and 80°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 5
  3. Obtuse
  4. 100
  5. 80
  6. 90
  7. 60
  8. 130
  9. 180
  10. 30
  11. 105
  12. 65
  13. Acute
  14. 55
  15. Acute
  16. 30
  17. 150
  18. 75
  19. 160
  20. Acute
  21. 40
  22. 50
  23. 200
  24. Right
  25. Obtuse
  26. 15
  27. 40
  28. 10
  29. 90
  30. 85
  31. 5
  32. 75
  33. 95
  34. 210
  35. 50
  36. 135
  37. 150
  38. 125
  39. 60
  40. 55

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