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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 605 · 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.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  3. 3.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 110°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  33. 33.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 30
  3. 125
  4. 115
  5. 130
  6. 85
  7. 80
  8. 10
  9. 150
  10. 70
  11. 110
  12. Straight
  13. 120
  14. 120
  15. 75
  16. 80
  17. 35
  18. 60
  19. 5
  20. 180
  21. 85
  22. 75
  23. 45
  24. 50
  25. 90
  26. 15
  27. 100
  28. 80
  29. 95
  30. 60
  31. 145
  32. Right
  33. 55
  34. 160
  35. 70
  36. 5
  37. 35
  38. 90
  39. 170
  40. 20

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