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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 317 · 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 8 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (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.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  18. 18.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  19. 19.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 55° and 90°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  29. 29.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  30. 30.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. 75
  3. 65
  4. 5
  5. 70
  6. 150
  7. Straight
  8. 90
  9. 30
  10. 130
  11. 60
  12. 35
  13. 60
  14. 20
  15. 80
  16. 45
  17. 100
  18. Obtuse
  19. 25
  20. 140
  21. 130
  22. 150
  23. 20
  24. 75
  25. 35
  26. 10
  27. 35
  28. 120
  29. Acute
  30. 70
  31. 50
  32. 40
  33. 130
  34. 135
  35. 100
  36. 160
  37. 90
  38. 15
  39. 65
  40. 105

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