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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 16 · 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.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 60° and 20°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  7. 7.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  8. 8.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  9. 9.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  10. 10.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  11. 11.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  30. 30.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 30° and 135°. What is the third angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?

Answer key

  1. 60
  2. 125
  3. 30
  4. 100
  5. 30
  6. Acute
  7. Right
  8. 60
  9. Acute
  10. Acute
  11. 150
  12. 120
  13. 20
  14. 135
  15. 160
  16. 110
  17. 75
  18. 105
  19. Straight
  20. 45
  21. 120
  22. 130
  23. 90
  24. 80
  25. 90
  26. 120
  27. 190
  28. 30
  29. 30
  30. Acute
  31. 150
  32. 140
  33. 100
  34. 5
  35. 80
  36. 190
  37. 65
  38. 15
  39. 60
  40. 140

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