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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 361 · 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 150°. What is the other angle (in degrees)?
  2. 2.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  3. 3.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  7. 7.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  9. 9.An angle measures 80°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  15. 15.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 50° and 35°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 100°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  21. 21.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  22. 22.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  31. 31.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  32. 32.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. Acute
  3. 20
  4. 120
  5. 70
  6. Obtuse
  7. 25
  8. 100
  9. Acute
  10. 120
  11. 45
  12. 145
  13. 15
  14. Right
  15. 20
  16. 30
  17. 170
  18. 95
  19. 120
  20. 40
  21. Acute
  22. 10
  23. 65
  24. 55
  25. 110
  26. 130
  27. 40
  28. 230
  29. 55
  30. 45
  31. Straight
  32. 95
  33. 75
  34. 180
  35. 130
  36. 130
  37. 75
  38. 60
  39. 10
  40. 85

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