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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 492 · 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 90° and 80°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 90° and 60°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  16. 16.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  17. 17.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  18. 18.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  24. 24.An angle measures 120°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  25. 25.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  26. 26.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  36. 36.An angle measures 135°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  37. 37.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?

Answer key

  1. 190
  2. 25
  3. 25
  4. Straight
  5. 25
  6. 120
  7. 240
  8. 125
  9. 150
  10. 180
  11. 20
  12. 30
  13. 30
  14. 140
  15. 55
  16. Acute
  17. Obtuse
  18. 120
  19. 220
  20. 45
  21. 15
  22. 230
  23. 150
  24. Obtuse
  25. Acute
  26. 75
  27. 85
  28. 50
  29. 160
  30. 220
  31. 40
  32. 90
  33. 20
  34. 115
  35. 10
  36. Obtuse
  37. 30
  38. 60
  39. 80
  40. 90

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