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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 332 · 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 70°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  8. 8.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  10. 10.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  11. 11.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  17. 17.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  18. 18.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 45° and 130°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  29. 29.An angle measures 10°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  30. 30.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?

Answer key

  1. 20
  2. 180
  3. 85
  4. 210
  5. 115
  6. 105
  7. Straight
  8. 65
  9. 170
  10. Right
  11. 130
  12. 5
  13. 60
  14. 10
  15. 120
  16. 115
  17. Acute
  18. 25
  19. 5
  20. 110
  21. 85
  22. 130
  23. 20
  24. 115
  25. 100
  26. 70
  27. 70
  28. 60
  29. Acute
  30. 165
  31. 140
  32. 60
  33. 140
  34. 60
  35. 140
  36. 230
  37. 10
  38. 200
  39. 60
  40. 140

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