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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 276 · 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.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 140°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  6. 6.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  13. 13.An angle measures 85°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  19. 19.An angle measures 50°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 70° and 55°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  35. 35.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  36. 36.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 5°. What is the other 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. 120
  2. 50
  3. 20
  4. 100
  5. Right
  6. 105
  7. 125
  8. 180
  9. 70
  10. Straight
  11. 55
  12. 30
  13. Acute
  14. 30
  15. 5
  16. 75
  17. 50
  18. 150
  19. Acute
  20. 60
  21. 90
  22. 150
  23. 230
  24. 120
  25. 165
  26. 65
  27. 160
  28. 140
  29. 40
  30. 20
  31. 120
  32. 55
  33. 60
  34. 75
  35. Obtuse
  36. 240
  37. 60
  38. 65
  39. 85
  40. 25

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