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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 459 · 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.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  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 135°. What is the other angle (in degrees)?
  15. 15.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  16. 16.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 50° and 85°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  28. 28.Two angles of a triangle are 85° and 25°. 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.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  32. 32.An angle measures 25°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  33. 33.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  34. 34.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. 5
  3. 90
  4. 150
  5. 180
  6. 125
  7. 25
  8. 15
  9. 150
  10. 120
  11. 10
  12. Right
  13. 60
  14. 45
  15. Straight
  16. 120
  17. 5
  18. 30
  19. 210
  20. 65
  21. 25
  22. 30
  23. 35
  24. 45
  25. 20
  26. 90
  27. Acute
  28. 70
  29. 20
  30. 40
  31. 60
  32. Acute
  33. Obtuse
  34. 55
  35. 80
  36. 145
  37. 60
  38. 70
  39. 20
  40. 15

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