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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 991 · 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.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  6. 6.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  8. 8.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  9. 9.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  10. 10.An angle measures 25°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 30° and 115°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 110°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 90° and 70°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 95°. What is the third angle (in degrees)?
  39. 39.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  40. 40.Two angles of a triangle are 25° and 75°. What is the third angle (in degrees)?

Answer key

  1. 85
  2. 170
  3. 35
  4. 170
  5. Straight
  6. 80
  7. 65
  8. Acute
  9. Acute
  10. Acute
  11. Right
  12. 60
  13. 120
  14. 35
  15. 15
  16. 25
  17. 15
  18. 100
  19. 50
  20. 90
  21. 150
  22. 160
  23. 105
  24. 150
  25. 120
  26. 70
  27. 85
  28. 165
  29. 90
  30. 60
  31. 30
  32. 200
  33. 100
  34. 20
  35. 20
  36. 105
  37. 70
  38. 45
  39. Acute
  40. 80

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