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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 641 · 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 140° and 80°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  21. 21.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  22. 22.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  23. 23.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  24. 24.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 30° and 140°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 60° and 35°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 75°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 140
  2. 150
  3. 160
  4. 120
  5. 190
  6. 180
  7. 45
  8. 220
  9. 60
  10. 70
  11. 65
  12. 10
  13. 190
  14. 30
  15. 45
  16. Right
  17. 170
  18. 80
  19. 70
  20. 120
  21. Acute
  22. 140
  23. Straight
  24. 55
  25. 130
  26. 5
  27. 10
  28. 85
  29. 85
  30. 115
  31. 60
  32. 70
  33. 125
  34. 190
  35. 85
  36. 50
  37. 20
  38. 150
  39. 150
  40. 35

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