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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 273 · 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 30°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  6. 6.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 95°. 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.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 35° and 90°. What is the third angle (in degrees)?
  24. 24.An angle measures 110°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  25. 25.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  30. 30.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  31. 31.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?

Answer key

  1. 150
  2. 60
  3. 90
  4. Straight
  5. Right
  6. 120
  7. 150
  8. 180
  9. 240
  10. 130
  11. 30
  12. 85
  13. 60
  14. 80
  15. 10
  16. 80
  17. 80
  18. 55
  19. 110
  20. 50
  21. 70
  22. 20
  23. 55
  24. Obtuse
  25. 100
  26. 30
  27. 160
  28. 85
  29. 60
  30. Acute
  31. 25
  32. 40
  33. 80
  34. 10
  35. 85
  36. 30
  37. 100
  38. 120
  39. 75
  40. 130

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