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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 181 · 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.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  7. 7.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  17. 17.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  18. 18.An angle measures 120°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  19. 19.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  22. 22.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  23. 23.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 90° and 25°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  33. 33.An angle measures 65°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  34. 34.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  38. 38.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. 160
  3. 140
  4. 150
  5. 30
  6. Right
  7. 60
  8. 140
  9. 155
  10. 105
  11. 170
  12. 5
  13. 25
  14. 40
  15. 20
  16. 130
  17. Obtuse
  18. Obtuse
  19. 15
  20. 180
  21. 70
  22. Straight
  23. 135
  24. 65
  25. 75
  26. 180
  27. 170
  28. 105
  29. 65
  30. 60
  31. 40
  32. 80
  33. Acute
  34. 70
  35. 30
  36. 60
  37. 120
  38. 80
  39. 80
  40. 110

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