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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 262 · 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 30° and 30°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 50° and 45°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  15. 15.An angle measures 55°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  23. 23.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?

Answer key

  1. 120
  2. 75
  3. 85
  4. 120
  5. 65
  6. 170
  7. 30
  8. 150
  9. 50
  10. 30
  11. 105
  12. 30
  13. 10
  14. 30
  15. Acute
  16. 45
  17. 150
  18. 180
  19. 35
  20. 10
  21. 90
  22. Right
  23. 65
  24. 140
  25. 115
  26. 120
  27. 125
  28. 50
  29. 15
  30. 110
  31. 130
  32. 110
  33. 180
  34. 80
  35. 70
  36. 45
  37. 120
  38. 45
  39. 150
  40. 60

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