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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 149 · 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 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  15. 15.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  16. 16.A right angle is split into two angles. One of them is 40°. 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.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  19. 19.An angle measures 50°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  20. 20.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 145°. What is the third angle (in degrees)?
  26. 26.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  27. 27.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 90
  3. 65
  4. 60
  5. 40
  6. 50
  7. 90
  8. 150
  9. 105
  10. 120
  11. 180
  12. 20
  13. 190
  14. Right
  15. Acute
  16. 50
  17. 60
  18. 35
  19. Acute
  20. 70
  21. 25
  22. 35
  23. Obtuse
  24. 55
  25. 5
  26. Obtuse
  27. 25
  28. 75
  29. 115
  30. 110
  31. 130
  32. 140
  33. 15
  34. 90
  35. 30
  36. 200
  37. 85
  38. 70
  39. 75
  40. 190

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