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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 60 · 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 together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  2. 2.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  3. 3.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 25° and 70°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  16. 16.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  19. 19.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 50° and 100°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  23. 23.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  24. 24.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. Acute
  3. 150
  4. 70
  5. 85
  6. 25
  7. 130
  8. 160
  9. 15
  10. 75
  11. 190
  12. 135
  13. 140
  14. 20
  15. 60
  16. Acute
  17. 35
  18. Right
  19. 120
  20. 30
  21. 100
  22. 65
  23. Acute
  24. 75
  25. 15
  26. 140
  27. 85
  28. 60
  29. 170
  30. 90
  31. 150
  32. 120
  33. 165
  34. 45
  35. 150
  36. 80
  37. 80
  38. 60
  39. 180
  40. 35

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