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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 832 · 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.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  2. 2.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  13. 13.An angle measures 120°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  14. 14.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  17. 17.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 180°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  26. 26.An angle measures 65°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  30. 30.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 90°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 35° and 130°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 90
  3. 55
  4. 30
  5. 120
  6. 60
  7. 50
  8. 55
  9. 85
  10. 85
  11. 160
  12. 60
  13. Obtuse
  14. Obtuse
  15. 90
  16. Acute
  17. 150
  18. 120
  19. 160
  20. 25
  21. 75
  22. 120
  23. 120
  24. 35
  25. 120
  26. Acute
  27. 20
  28. 65
  29. Obtuse
  30. 165
  31. 110
  32. 15
  33. 150
  34. 35
  35. 5
  36. 90
  37. 15
  38. 15
  39. 95
  40. 60

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