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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 454 · 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 95° and 50°. What is the third angle (in degrees)?
  2. 2.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  6. 6.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 50° and 115°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 200°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  24. 24.An angle measures 130°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  25. 25.An angle measures 160°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  26. 26.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 25°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. Obtuse
  3. 60
  4. 20
  5. Straight
  6. 80
  7. 15
  8. 85
  9. 260
  10. 105
  11. 90
  12. 10
  13. 150
  14. 70
  15. 110
  16. 60
  17. 115
  18. 45
  19. 40
  20. 250
  21. 170
  22. 50
  23. 55
  24. Obtuse
  25. Obtuse
  26. 35
  27. 150
  28. 120
  29. 80
  30. 180
  31. 55
  32. 160
  33. 10
  34. 125
  35. 90
  36. 5
  37. 90
  38. 120
  39. 100
  40. 150

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