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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 453 · 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 1 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  4. 4.Three angles meet at a point. Two of them are 60° and 90°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 65° and 75°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  11. 11.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  17. 17.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  20. 20.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  21. 21.Two angles of a triangle are 45° and 115°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  24. 24.An angle measures 170°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 60° and 80°. What is the third angle (in degrees)?
  29. 29.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  30. 30.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?

Answer key

  1. 30
  2. 65
  3. Straight
  4. 210
  5. 60
  6. 120
  7. 110
  8. 40
  9. 30
  10. Right
  11. 110
  12. 45
  13. 55
  14. 170
  15. 150
  16. 230
  17. Acute
  18. 75
  19. 95
  20. Obtuse
  21. 20
  22. 110
  23. 10
  24. Obtuse
  25. 90
  26. 120
  27. 20
  28. 40
  29. Acute
  30. 35
  31. 55
  32. 160
  33. 165
  34. 100
  35. 150
  36. 65
  37. 60
  38. 80
  39. 60
  40. 40

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