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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 839 · 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 160°. What is the other angle (in degrees)?
  2. 2.An angle measures 20°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  3. 3.Three angles meet at a point. Two of them are 90° and 190°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 85° and 55°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  20. 20.An angle measures 145°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  21. 21.An angle measures 130°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  23. 23.An angle measures 165°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  24. 24.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 60°. 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.Three angles meet at a point. Two of them are 150° and 110°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 95°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other 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 together make a straight line. One of them is 165°. What is the other angle (in degrees)?

Answer key

  1. 20
  2. Acute
  3. 80
  4. 75
  5. 85
  6. 80
  7. 180
  8. 40
  9. 30
  10. 90
  11. 100
  12. 45
  13. 130
  14. 180
  15. 170
  16. 40
  17. 90
  18. 25
  19. 60
  20. Obtuse
  21. Obtuse
  22. 120
  23. Obtuse
  24. 90
  25. 55
  26. Straight
  27. Acute
  28. 55
  29. 150
  30. 80
  31. 60
  32. 120
  33. 90
  34. 100
  35. 145
  36. 100
  37. 65
  38. 45
  39. 65
  40. 15

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