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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 282 · 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.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  6. 6.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.Three angles meet at a point. Two of them are 60° and 80°. 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.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  14. 14.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  15. 15.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  16. 16.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  21. 21.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  22. 22.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  27. 27.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  28. 28.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  40. 40.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute

Answer key

  1. 60
  2. 180
  3. 140
  4. 85
  5. Straight
  6. 10
  7. 90
  8. 45
  9. 150
  10. Acute
  11. 220
  12. 30
  13. 150
  14. Acute
  15. Acute
  16. 45
  17. 65
  18. 35
  19. 140
  20. 5
  21. Obtuse
  22. 160
  23. 75
  24. 30
  25. 75
  26. 5
  27. Acute
  28. 75
  29. 60
  30. 60
  31. 10
  32. 40
  33. 20
  34. 105
  35. 95
  36. 90
  37. 60
  38. 180
  39. 105
  40. Obtuse

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