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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 28 · 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 130° and 160°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 70° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  6. 6.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  11. 11.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  12. 12.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  15. 15.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 100° and 70°. What is the third 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.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  32. 32.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  33. 33.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  35. 35.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  36. 36.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 50
  3. 20
  4. 30
  5. Straight
  6. 90
  7. 55
  8. 30
  9. 130
  10. 50
  11. Acute
  12. 125
  13. 60
  14. Acute
  15. 120
  16. 15
  17. Right
  18. 250
  19. 180
  20. 20
  21. 70
  22. 190
  23. 120
  24. 70
  25. 25
  26. 55
  27. 50
  28. 10
  29. Acute
  30. 90
  31. 100
  32. Acute
  33. 75
  34. 35
  35. Acute
  36. 30
  37. 70
  38. 140
  39. 60
  40. 110

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