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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 210 · 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 70° and 150°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  10. 10.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  12. 12.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  13. 13.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.An angle measures 85°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  32. 32.An angle measures 10°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.An angle measures 120°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  36. 36.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  37. 37.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  38. 38.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  39. 39.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  40. 40.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?

Answer key

  1. 140
  2. 100
  3. 150
  4. 150
  5. 55
  6. 85
  7. 80
  8. 115
  9. Right
  10. 100
  11. 190
  12. Acute
  13. 230
  14. 60
  15. 60
  16. 25
  17. 220
  18. 155
  19. 75
  20. 60
  21. 160
  22. 10
  23. 120
  24. 190
  25. 30
  26. 90
  27. 50
  28. 150
  29. 140
  30. 30
  31. Acute
  32. Acute
  33. 110
  34. 65
  35. Obtuse
  36. Obtuse
  37. Acute
  38. 60
  39. Acute
  40. 90

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