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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 49 · 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 100° and 30°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 100°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  4. 4.An angle measures 45°. 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 5°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  9. 9.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  13. 13.An angle measures 50°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 70°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?

Answer key

  1. 50
  2. 55
  3. 45
  4. Acute
  5. 85
  6. 105
  7. 75
  8. Straight
  9. 30
  10. 160
  11. 25
  12. Right
  13. Acute
  14. 30
  15. 40
  16. 155
  17. 20
  18. 180
  19. 90
  20. 150
  21. 5
  22. 105
  23. 120
  24. 5
  25. 60
  26. 65
  27. 70
  28. 210
  29. 55
  30. 25
  31. 140
  32. 65
  33. 10
  34. 55
  35. 90
  36. 170
  37. 145
  38. 65
  39. 90
  40. 150

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