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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 489 · 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 145°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  8. 8.An angle measures 10°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. 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 together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 20° and 115°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  37. 37.An angle measures 140°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  38. 38.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 150
  3. 30
  4. 90
  5. 50
  6. 60
  7. 110
  8. Acute
  9. Right
  10. 180
  11. 90
  12. 5
  13. 60
  14. 45
  15. 60
  16. 80
  17. 45
  18. 150
  19. 10
  20. 30
  21. 60
  22. 150
  23. 155
  24. 30
  25. 210
  26. 115
  27. 30
  28. 160
  29. 90
  30. 80
  31. 140
  32. 20
  33. 115
  34. 75
  35. 25
  36. 70
  37. Obtuse
  38. 45
  39. 220
  40. 90

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