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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 158 · 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 70°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  2. 2.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  5. 5.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  11. 11.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  12. 12.Two angles of a triangle are 45° and 30°. What is the third angle (in degrees)?
  13. 13.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  14. 14.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  18. 18.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  24. 24.An angle measures 35°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  25. 25.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  32. 32.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  33. 33.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?

Answer key

  1. Acute
  2. 100
  3. 65
  4. Straight
  5. 140
  6. 70
  7. 30
  8. 125
  9. 15
  10. 10
  11. Acute
  12. 105
  13. Obtuse
  14. 55
  15. 110
  16. 15
  17. Right
  18. 230
  19. 70
  20. 45
  21. 100
  22. 55
  23. 60
  24. Acute
  25. 90
  26. 15
  27. 30
  28. 150
  29. 30
  30. 120
  31. 35
  32. Acute
  33. 120
  34. 30
  35. 145
  36. 90
  37. 70
  38. 130
  39. 90
  40. 20

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