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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 118 · 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 35°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 190°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 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.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  12. 12.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  13. 13.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  30. 30.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  34. 34.An angle measures 70°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  35. 35.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 85° and 85°. What is the third angle (in degrees)?

Answer key

  1. 145
  2. 110
  3. 100
  4. 45
  5. 90
  6. 180
  7. 90
  8. 80
  9. 70
  10. 240
  11. 220
  12. Obtuse
  13. 85
  14. 15
  15. 80
  16. Straight
  17. 170
  18. Right
  19. 120
  20. 60
  21. 150
  22. 165
  23. 105
  24. 140
  25. 20
  26. 30
  27. 150
  28. 60
  29. 60
  30. Acute
  31. 70
  32. 150
  33. 140
  34. Acute
  35. 130
  36. 75
  37. 35
  38. 60
  39. 65
  40. 10

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