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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 74 · 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.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  12. 12.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  20. 20.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  21. 21.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 95° and 50°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. 160
  3. 70
  4. 30
  5. 140
  6. 50
  7. 110
  8. 40
  9. 170
  10. 30
  11. Straight
  12. 140
  13. 60
  14. 150
  15. 155
  16. 80
  17. 60
  18. 80
  19. 55
  20. Obtuse
  21. 70
  22. 50
  23. 150
  24. 70
  25. 40
  26. 125
  27. 90
  28. 30
  29. 120
  30. 70
  31. 150
  32. 45
  33. 150
  34. 80
  35. 75
  36. 35
  37. 180
  38. 20
  39. 30
  40. 25

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