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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 532 · 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) Acute (b) Right (c) Straight
  2. 2.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  8. 8.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  9. 9.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 100°. What is the third 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 55° and 50°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  25. 25.An angle measures 145°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 75° and 100°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  32. 32.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 30
  3. 20
  4. 120
  5. 100
  6. 220
  7. 120
  8. Acute
  9. 120
  10. 120
  11. 180
  12. 150
  13. 70
  14. 80
  15. 25
  16. 160
  17. 60
  18. 75
  19. 30
  20. 180
  21. 25
  22. 55
  23. 105
  24. 90
  25. Obtuse
  26. 25
  27. 40
  28. 5
  29. 70
  30. 15
  31. Right
  32. 55
  33. 60
  34. 160
  35. 80
  36. 50
  37. 90
  38. 5
  39. 110
  40. 85

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