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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 667 · 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 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  2. 2.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  16. 16.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  17. 17.A right angle is split into two angles. One of them is 20°. 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.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  24. 24.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?

Answer key

  1. Right
  2. 140
  3. 20
  4. 145
  5. 90
  6. 55
  7. 150
  8. 85
  9. 120
  10. 10
  11. 80
  12. 75
  13. 15
  14. 75
  15. 55
  16. Straight
  17. 70
  18. 180
  19. 25
  20. 65
  21. 90
  22. 70
  23. 170
  24. Acute
  25. 125
  26. 10
  27. 70
  28. 20
  29. 130
  30. 135
  31. 40
  32. 90
  33. 85
  34. 150
  35. 150
  36. 45
  37. 10
  38. 55
  39. 90
  40. 60

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