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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 131 · 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 35° and 20°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  4. 4.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  5. 5.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  6. 6.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  7. 7.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  17. 17.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  20. 20.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  24. 24.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  25. 25.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  35. 35.An angle measures 70°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  37. 37.Two angles of a triangle are 25° and 85°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?

Answer key

  1. 125
  2. 30
  3. 160
  4. Acute
  5. Acute
  6. Acute
  7. 80
  8. 30
  9. 90
  10. 60
  11. 45
  12. 80
  13. 180
  14. 105
  15. 30
  16. 85
  17. Acute
  18. 55
  19. 60
  20. Acute
  21. 150
  22. 20
  23. 80
  24. Acute
  25. 150
  26. 85
  27. 30
  28. 160
  29. 70
  30. 85
  31. 140
  32. 200
  33. 80
  34. 230
  35. Acute
  36. Obtuse
  37. 70
  38. 65
  39. 55
  40. 140

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