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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 742 · 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.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  10. 10.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  13. 13.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  15. 15.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 130° and 160°. 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.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 110° and 170°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  32. 32.An angle measures 130°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 65
  2. 125
  3. 75
  4. 5
  5. 10
  6. 40
  7. 145
  8. 20
  9. 90
  10. Obtuse
  11. 15
  12. Straight
  13. 70
  14. Right
  15. 60
  16. 15
  17. 50
  18. 15
  19. 130
  20. 30
  21. 70
  22. 150
  23. 220
  24. 120
  25. 90
  26. 50
  27. 80
  28. 60
  29. 60
  30. 85
  31. 110
  32. Obtuse
  33. 110
  34. 35
  35. 30
  36. 90
  37. 135
  38. 65
  39. 150
  40. 90

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