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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 267 · 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 10°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  4. 4.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  6. 6.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  7. 7.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 70°. What is the other 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 30° and 125°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 30°. What is the other 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.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  38. 38.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?

Answer key

  1. 80
  2. 135
  3. Acute
  4. 130
  5. Straight
  6. Right
  7. 30
  8. 20
  9. 70
  10. 30
  11. 150
  12. 120
  13. 115
  14. 50
  15. 95
  16. 120
  17. 150
  18. 25
  19. 60
  20. 25
  21. 145
  22. 110
  23. 65
  24. 85
  25. 180
  26. 85
  27. 150
  28. 130
  29. 45
  30. 25
  31. 70
  32. 100
  33. 90
  34. 120
  35. 60
  36. 5
  37. Obtuse
  38. 130
  39. 35
  40. 40

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