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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 594 · 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 90° and 60°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 40° and 30°. 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.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  40. 40.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute

Answer key

  1. 210
  2. 130
  3. Straight
  4. 10
  5. 5
  6. 40
  7. 15
  8. 90
  9. 20
  10. 155
  11. 30
  12. 180
  13. 180
  14. 85
  15. 80
  16. 60
  17. 40
  18. 140
  19. 70
  20. 80
  21. 110
  22. 105
  23. 70
  24. 35
  25. 130
  26. 100
  27. 150
  28. 110
  29. 65
  30. 60
  31. 35
  32. 85
  33. 190
  34. 90
  35. 170
  36. 15
  37. 85
  38. 70
  39. 45
  40. Obtuse

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