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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 327 · 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 120° and 170°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.An angle measures 125°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  13. 13.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 7 o'clock (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.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  38. 38.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  39. 39.An angle measures 25°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  40. 40.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight

Answer key

  1. 70
  2. 90
  3. 60
  4. 110
  5. 140
  6. 125
  7. 15
  8. 65
  9. 55
  10. 60
  11. Right
  12. Obtuse
  13. 60
  14. 30
  15. 155
  16. 5
  17. 55
  18. 75
  19. 70
  20. 85
  21. 150
  22. 100
  23. 80
  24. 75
  25. 110
  26. 140
  27. 110
  28. 170
  29. 150
  30. 25
  31. 160
  32. 120
  33. 25
  34. 50
  35. 150
  36. 75
  37. Acute
  38. Straight
  39. Acute
  40. Obtuse

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