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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 868 · 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.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  9. 9.An angle measures 30°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  10. 10.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  28. 28.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  29. 29.An angle measures 120°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  30. 30.Two angles of a triangle are 45° and 35°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  33. 33.An angle measures 165°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  40. 40.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Right

Answer key

  1. 130
  2. 60
  3. Straight
  4. 130
  5. 70
  6. 100
  7. 45
  8. 20
  9. Acute
  10. 80
  11. 85
  12. 65
  13. 115
  14. 120
  15. 150
  16. 150
  17. 40
  18. 30
  19. 150
  20. 60
  21. 75
  22. 170
  23. Right
  24. 5
  25. 30
  26. 20
  27. 85
  28. Acute
  29. Obtuse
  30. 100
  31. 60
  32. 160
  33. Obtuse
  34. 120
  35. 50
  36. 60
  37. 110
  38. 30
  39. 145
  40. Acute

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