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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 352 · 40 sums
TalentJR

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 90°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  8. 8.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  25. 25.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  34. 34.An angle measures 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  35. 35.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?

Answer key

  1. 130
  2. 15
  3. 130
  4. 55
  5. 80
  6. 30
  7. Straight
  8. 65
  9. 20
  10. 210
  11. 190
  12. 170
  13. 90
  14. 90
  15. 90
  16. 190
  17. 140
  18. 15
  19. 45
  20. 170
  21. 120
  22. 55
  23. 120
  24. 150
  25. Right
  26. 120
  27. 85
  28. 60
  29. 60
  30. 75
  31. 50
  32. 105
  33. 20
  34. Obtuse
  35. 90
  36. 25
  37. 40
  38. 115
  39. 25
  40. 70

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