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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 76 · 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 70°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  4. 4.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  5. 5.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.An angle measures 25°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  13. 13.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  14. 14.An angle measures 15°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 45° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (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.Two angles together make a straight line. One of them is 160°. What is the other 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.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  39. 39.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  40. 40.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?

Answer key

  1. 150
  2. 15
  3. 30
  4. Right
  5. 150
  6. 120
  7. 200
  8. 130
  9. 80
  10. 90
  11. 150
  12. Acute
  13. 130
  14. Acute
  15. Obtuse
  16. 70
  17. 120
  18. 150
  19. 60
  20. 65
  21. 5
  22. 150
  23. 40
  24. 40
  25. 85
  26. 60
  27. 50
  28. 20
  29. 85
  30. 200
  31. 140
  32. 50
  33. 70
  34. 145
  35. 45
  36. 70
  37. 95
  38. 75
  39. Obtuse
  40. 75

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