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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 550 · 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 120°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  2. 2.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  13. 13.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 45° and 90°. 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 together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  22. 22.An angle measures 55°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  23. 23.Two angles together make a straight line. One of them is 165°. 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.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  28. 28.Two angles of a triangle are 60° and 110°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  33. 33.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  34. 34.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  37. 37.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  38. 38.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 115
  3. 20
  4. 120
  5. 230
  6. 85
  7. 150
  8. 80
  9. 15
  10. 50
  11. 80
  12. 25
  13. Straight
  14. 150
  15. 140
  16. 45
  17. 55
  18. 10
  19. 120
  20. 5
  21. 200
  22. Acute
  23. 15
  24. 20
  25. Obtuse
  26. 90
  27. Obtuse
  28. 10
  29. 180
  30. 80
  31. 20
  32. 30
  33. Acute
  34. 55
  35. 105
  36. 80
  37. Right
  38. 25
  39. 130
  40. 130

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