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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 728 · 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 50° and 45°. What is the third angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  3. 3.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 5°. 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 of a triangle are 20° and 90°. What is the third angle (in degrees)?
  10. 10.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 210°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  20. 20.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  22. 22.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. Right
  3. 75
  4. 65
  5. 20
  6. 30
  7. 85
  8. 15
  9. 70
  10. Acute
  11. 90
  12. 100
  13. 120
  14. 90
  15. 160
  16. 90
  17. 60
  18. 25
  19. 70
  20. Obtuse
  21. 80
  22. Straight
  23. 110
  24. 160
  25. 90
  26. 140
  27. 40
  28. 150
  29. 90
  30. 150
  31. 30
  32. 120
  33. 45
  34. 15
  35. 105
  36. 150
  37. 25
  38. 85
  39. 55
  40. 140

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