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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 818 · 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.An angle measures 165°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  2. 2.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  3. 3.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.An angle measures 80°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  12. 12.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 160°. What is the other 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 35°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 105°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 130°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 40
  3. Acute
  4. Straight
  5. 90
  6. 50
  7. 250
  8. 55
  9. 170
  10. 60
  11. Acute
  12. 15
  13. 120
  14. 200
  15. 75
  16. 70
  17. 20
  18. 155
  19. 145
  20. 35
  21. 160
  22. 250
  23. 40
  24. 30
  25. 120
  26. 140
  27. 115
  28. 10
  29. 60
  30. 160
  31. 65
  32. 130
  33. 95
  34. 80
  35. 70
  36. 160
  37. 20
  38. 140
  39. 55
  40. 75

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