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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 3 · 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.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  3. 3.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  4. 4.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 45° and 130°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  23. 23.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 25° and 120°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. Straight
  3. Acute
  4. 30
  5. 10
  6. 130
  7. 60
  8. 25
  9. 10
  10. 55
  11. 60
  12. 90
  13. 60
  14. 150
  15. 200
  16. 75
  17. 5
  18. 155
  19. 150
  20. 120
  21. 150
  22. Right
  23. 105
  24. 20
  25. 15
  26. 220
  27. 180
  28. 35
  29. 20
  30. 30
  31. 60
  32. 10
  33. 75
  34. 30
  35. 15
  36. 70
  37. 150
  38. 75
  39. 85
  40. 45

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