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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 20 · 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 230°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  14. 14.An angle measures 70°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  15. 15.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  19. 19.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  20. 20.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 20° and 135°. What is the third angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  24. 24.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 80° and 70°. What is the third 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.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 15°. 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.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 50° and 150°. 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. 80
  2. 75
  3. 120
  4. 60
  5. 50
  6. 135
  7. 90
  8. 45
  9. 60
  10. Straight
  11. 65
  12. 140
  13. 60
  14. Acute
  15. 170
  16. 25
  17. 120
  18. 60
  19. Acute
  20. 105
  21. 90
  22. 25
  23. Right
  24. 85
  25. 60
  26. 210
  27. 110
  28. 160
  29. 120
  30. 125
  31. 5
  32. 165
  33. 150
  34. 100
  35. 10
  36. 60
  37. 65
  38. 20
  39. 160
  40. 30

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