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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 403 · 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.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  3. 3.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  4. 4.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  6. 6.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  21. 21.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  22. 22.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  24. 24.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  27. 27.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?

Answer key

  1. 110
  2. Straight
  3. 25
  4. Obtuse
  5. 135
  6. Obtuse
  7. 25
  8. 80
  9. 50
  10. 100
  11. 170
  12. 190
  13. 15
  14. 25
  15. 70
  16. 130
  17. 20
  18. 55
  19. 170
  20. 115
  21. Obtuse
  22. 40
  23. 180
  24. Obtuse
  25. 10
  26. Right
  27. 60
  28. 45
  29. 145
  30. 30
  31. Obtuse
  32. 85
  33. 5
  34. 10
  35. 60
  36. 35
  37. 30
  38. 65
  39. 120
  40. 170

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