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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 465 · 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.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 150°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  20. 20.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. 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 115°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  26. 26.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  29. 29.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  35. 35.An angle measures 10°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  36. 36.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. 10
  3. 45
  4. 30
  5. 40
  6. 25
  7. 120
  8. 145
  9. 5
  10. 85
  11. 70
  12. 180
  13. 190
  14. 80
  15. 50
  16. 150
  17. 15
  18. 80
  19. Straight
  20. 250
  21. 95
  22. 65
  23. 150
  24. 5
  25. 10
  26. Acute
  27. 155
  28. Obtuse
  29. 30
  30. 140
  31. 20
  32. 100
  33. 55
  34. 60
  35. Acute
  36. 40
  37. 50
  38. 60
  39. 150
  40. 80

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