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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 425 · 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.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  2. 2.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  27. 27.Two angles of a triangle are 60° and 85°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. 80
  3. 20
  4. 85
  5. 60
  6. 80
  7. 25
  8. 150
  9. 80
  10. 120
  11. 20
  12. 65
  13. 160
  14. 220
  15. 180
  16. 50
  17. 55
  18. 120
  19. 80
  20. 70
  21. 75
  22. 35
  23. 150
  24. 30
  25. 85
  26. 60
  27. 35
  28. 110
  29. 60
  30. 115
  31. 35
  32. 70
  33. 30
  34. 120
  35. 140
  36. 10
  37. 120
  38. 160
  39. 140
  40. 105

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