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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 121 · 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 6 o'clock (in degrees)?
  2. 2.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  3. 3.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  15. 15.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  18. 18.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  21. 21.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  22. 22.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  28. 28.An angle measures 35°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  29. 29.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  31. 31.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 180
  2. Acute
  3. 155
  4. 30
  5. 80
  6. Acute
  7. 10
  8. 75
  9. 130
  10. 90
  11. 60
  12. 35
  13. 220
  14. 30
  15. Acute
  16. 110
  17. Right
  18. 200
  19. 30
  20. 130
  21. Obtuse
  22. 110
  23. 85
  24. 125
  25. 70
  26. 170
  27. 160
  28. Acute
  29. 65
  30. 15
  31. Obtuse
  32. 50
  33. 5
  34. 90
  35. 75
  36. 25
  37. 30
  38. 15
  39. 110
  40. 25

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