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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 168 · 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 of a triangle are 40° and 105°. What is the third 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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  9. 9.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  15. 15.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  17. 17.An angle measures 95°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.An angle measures 30°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  21. 21.An angle measures 150°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  22. 22.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  26. 26.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  27. 27.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  28. 28.An angle measures 15°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  29. 29.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 95° and 65°. What is the third angle (in degrees)?
  31. 31.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  35. 35.An angle measures 80°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  40. 40.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?

Answer key

  1. 35
  2. 165
  3. 85
  4. 150
  5. 60
  6. 90
  7. 65
  8. Straight
  9. 160
  10. 180
  11. 120
  12. 75
  13. 30
  14. 60
  15. Obtuse
  16. 145
  17. Obtuse
  18. 90
  19. Acute
  20. 30
  21. Obtuse
  22. 60
  23. 190
  24. 10
  25. 15
  26. Obtuse
  27. 120
  28. Acute
  29. 55
  30. 20
  31. Obtuse
  32. 45
  33. 5
  34. 15
  35. Acute
  36. 60
  37. 15
  38. 90
  39. Right
  40. 10

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