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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 525 · 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 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  2. 2.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  14. 14.An angle measures 35°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  15. 15.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  16. 16.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  18. 18.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  19. 19.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. Right
  2. 100
  3. 180
  4. 150
  5. 15
  6. 10
  7. 90
  8. 10
  9. 60
  10. 80
  11. Straight
  12. 50
  13. 100
  14. Acute
  15. Obtuse
  16. 25
  17. 60
  18. Obtuse
  19. 50
  20. 30
  21. 60
  22. 75
  23. 200
  24. 35
  25. 85
  26. 70
  27. 150
  28. 100
  29. 160
  30. 55
  31. 35
  32. 85
  33. 150
  34. 40
  35. 190
  36. 160
  37. 120
  38. 190
  39. 150
  40. 30

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