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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 782 · 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.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 15°. 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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  8. 8.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  9. 9.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  10. 10.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  12. 12.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  13. 13.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  22. 22.An angle measures 95°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  23. 23.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  30. 30.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 40° and 65°. What is the third 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.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. 45
  2. 20
  3. 50
  4. 45
  5. 75
  6. 60
  7. Straight
  8. Right
  9. Obtuse
  10. 230
  11. 160
  12. Acute
  13. 80
  14. 200
  15. 140
  16. 30
  17. 145
  18. 60
  19. 60
  20. 60
  21. 180
  22. Obtuse
  23. 90
  24. 140
  25. 120
  26. 85
  27. 80
  28. 15
  29. 120
  30. 85
  31. 85
  32. 75
  33. 55
  34. 80
  35. 250
  36. 50
  37. 70
  38. 90
  39. Acute
  40. 30

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