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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 280 · 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 of a triangle are 85° and 40°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 25° and 140°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  16. 16.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  22. 22.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  23. 23.Two angles together make a straight line. One of them is 150°. What is the other angle (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 60° and 115°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (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.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?

Answer key

  1. 55
  2. 180
  3. 155
  4. Acute
  5. 65
  6. 130
  7. 40
  8. 15
  9. 10
  10. 120
  11. 30
  12. 35
  13. 120
  14. 60
  15. Straight
  16. 110
  17. 20
  18. 105
  19. 125
  20. 150
  21. 20
  22. Acute
  23. 30
  24. 30
  25. 5
  26. 45
  27. 150
  28. 85
  29. 80
  30. 80
  31. 15
  32. 250
  33. 40
  34. 80
  35. 210
  36. 35
  37. 45
  38. 200
  39. 5
  40. 90

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