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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 92 · 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) Right (b) Straight (c) Obtuse
  2. 2.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  3. 3.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  10. 10.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  20. 20.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 30° and 145°. 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.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. 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 90°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. Straight
  2. Right
  3. 90
  4. 170
  5. 120
  6. 120
  7. 105
  8. 90
  9. Acute
  10. 25
  11. 65
  12. 85
  13. 100
  14. 15
  15. 40
  16. 55
  17. 10
  18. 125
  19. Acute
  20. 140
  21. 75
  22. 155
  23. 35
  24. 60
  25. 180
  26. 35
  27. 110
  28. 50
  29. 30
  30. 5
  31. 120
  32. 200
  33. 75
  34. 70
  35. 90
  36. 55
  37. 40
  38. 30
  39. 60
  40. 75

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