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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 389 · 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 25° and 115°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  8. 8.An angle measures 115°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  9. 9.Two angles together make a straight line. One of them is 15°. 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.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  12. 12.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 140°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 65° and 110°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  22. 22.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  23. 23.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  24. 24.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 70°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  35. 35.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  36. 36.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  38. 38.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  39. 39.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?

Answer key

  1. 40
  2. 95
  3. 5
  4. 75
  5. 180
  6. 75
  7. 170
  8. Obtuse
  9. 165
  10. 85
  11. Straight
  12. 150
  13. 65
  14. 5
  15. 60
  16. 70
  17. 60
  18. 30
  19. 5
  20. 65
  21. 150
  22. Obtuse
  23. 90
  24. Obtuse
  25. 90
  26. 10
  27. 55
  28. 70
  29. 140
  30. 170
  31. 115
  32. 230
  33. 60
  34. 100
  35. Right
  36. 150
  37. 25
  38. Acute
  39. 60
  40. 110

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