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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 164 · 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 55°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  4. 4.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.An angle measures 85°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  20. 20.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  23. 23.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  32. 32.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  33. 33.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  35. 35.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  36. 36.Three angles meet at a point. Two of them are 60° and 230°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 45° and 70°. What is the third angle (in degrees)?

Answer key

  1. 125
  2. 20
  3. Right
  4. 10
  5. 25
  6. 45
  7. 50
  8. 75
  9. 25
  10. 60
  11. 30
  12. 90
  13. 80
  14. 165
  15. 30
  16. 120
  17. 120
  18. 140
  19. Acute
  20. 150
  21. 50
  22. Obtuse
  23. 115
  24. 30
  25. 160
  26. 90
  27. 10
  28. 140
  29. 70
  30. 90
  31. 55
  32. Straight
  33. 60
  34. 100
  35. Acute
  36. 70
  37. 150
  38. 150
  39. 160
  40. 65

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