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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 441 · 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 160°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  2. 2.An angle measures 95°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  3. 3.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  9. 9.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  16. 16.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  26. 26.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  27. 27.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 15°. 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 50° and 45°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 85° and 55°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. Obtuse
  3. 65
  4. 75
  5. 90
  6. 20
  7. 210
  8. Right
  9. 100
  10. 125
  11. 35
  12. 155
  13. 30
  14. 70
  15. Obtuse
  16. 60
  17. 55
  18. 110
  19. 65
  20. 95
  21. 60
  22. 170
  23. 120
  24. 30
  25. 150
  26. Acute
  27. Acute
  28. 5
  29. 90
  30. 20
  31. 75
  32. 40
  33. 85
  34. 60
  35. 40
  36. 30
  37. 90
  38. 90
  39. 40
  40. 10

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