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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 629 · 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 85°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  5. 5.An angle measures 40°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  6. 6.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  13. 13.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 60° and 105°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  23. 23.An angle measures 70°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  24. 24.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  26. 26.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  27. 27.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  36. 36.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  37. 37.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 95
  2. 165
  3. 100
  4. 150
  5. Acute
  6. 20
  7. 5
  8. 180
  9. 60
  10. 5
  11. 5
  12. Straight
  13. 30
  14. 40
  15. 160
  16. 15
  17. 55
  18. 55
  19. 15
  20. 10
  21. 70
  22. 70
  23. Acute
  24. 150
  25. 65
  26. Right
  27. 90
  28. 55
  29. 110
  30. 90
  31. 70
  32. 180
  33. 130
  34. 120
  35. 250
  36. Obtuse
  37. 80
  38. 80
  39. 30
  40. 155

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