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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 337 · 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 35°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 45° and 90°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  6. 6.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  7. 7.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  8. 8.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 25°. 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.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  17. 17.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 20° and 155°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  36. 36.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  38. 38.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?

Answer key

  1. 145
  2. 45
  3. 20
  4. 25
  5. 220
  6. Obtuse
  7. Obtuse
  8. 30
  9. 45
  10. 115
  11. 85
  12. 60
  13. 65
  14. 80
  15. 50
  16. Right
  17. 150
  18. 135
  19. 40
  20. 150
  21. 30
  22. 125
  23. 55
  24. 180
  25. 40
  26. 75
  27. 80
  28. 5
  29. 150
  30. 200
  31. 40
  32. 70
  33. 85
  34. 70
  35. 10
  36. Acute
  37. Acute
  38. 100
  39. 155
  40. 35

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