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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 924 · 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 70°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  3. 3.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  5. 5.An angle measures 55°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  11. 11.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  17. 17.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  18. 18.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  30. 30.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  31. 31.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  40. 40.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right

Answer key

  1. 60
  2. 90
  3. Obtuse
  4. 100
  5. Acute
  6. 120
  7. 140
  8. 25
  9. 60
  10. Right
  11. 40
  12. 5
  13. 155
  14. 115
  15. 200
  16. 170
  17. Acute
  18. 50
  19. 55
  20. 140
  21. 120
  22. 70
  23. 95
  24. 20
  25. 105
  26. 65
  27. 85
  28. 65
  29. Acute
  30. 85
  31. Obtuse
  32. 180
  33. 60
  34. 40
  35. 180
  36. 160
  37. 150
  38. 150
  39. Obtuse
  40. Straight

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