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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 535 · 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 55°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  12. 12.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  34. 34.An angle measures 30°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  35. 35.An angle measures 60°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  36. 36.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?

Answer key

  1. 125
  2. 65
  3. 190
  4. 110
  5. 80
  6. 155
  7. 170
  8. 15
  9. 130
  10. 70
  11. Right
  12. 20
  13. 80
  14. 80
  15. 120
  16. 75
  17. 180
  18. 95
  19. 45
  20. Straight
  21. 30
  22. 90
  23. 10
  24. 90
  25. 60
  26. 5
  27. 60
  28. 55
  29. 135
  30. 60
  31. 150
  32. 5
  33. 25
  34. Acute
  35. Acute
  36. 20
  37. 30
  38. 130
  39. 180
  40. 95

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