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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 172 · 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.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  4. 4.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  5. 5.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  9. 9.Three angles meet at a point. Two of them are 90° and 180°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  12. 12.An angle measures 25°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  13. 13.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  17. 17.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  18. 18.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  20. 20.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  21. 21.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  25. 25.An angle measures 145°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. 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 90° and 200°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  32. 32.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 25° and 120°. What is the third 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.Two angles of a triangle are 65° and 75°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  37. 37.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  38. 38.What is the smaller angle between the hands of a clock at 2 o'clock (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 135°. What is the other angle (in degrees)?

Answer key

  1. 95
  2. 150
  3. 110
  4. Obtuse
  5. 130
  6. 60
  7. 35
  8. Right
  9. 90
  10. 90
  11. 160
  12. Acute
  13. 220
  14. 55
  15. 60
  16. 40
  17. Acute
  18. 10
  19. 5
  20. Acute
  21. 75
  22. 150
  23. 85
  24. 90
  25. Obtuse
  26. 140
  27. 30
  28. 55
  29. 70
  30. 200
  31. Straight
  32. 35
  33. 35
  34. 80
  35. 40
  36. 140
  37. Obtuse
  38. 60
  39. 30
  40. 45

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