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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 29 · 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.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  2. 2.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  3. 3.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  10. 10.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 100° and 130°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  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.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 80° and 95°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  40. 40.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute

Answer key

  1. 240
  2. Acute
  3. 115
  4. 60
  5. 25
  6. 10
  7. 120
  8. 20
  9. Straight
  10. 65
  11. 150
  12. 40
  13. 85
  14. 170
  15. 30
  16. 230
  17. 100
  18. 5
  19. 130
  20. 130
  21. 45
  22. 180
  23. 140
  24. 105
  25. 150
  26. 85
  27. Acute
  28. 30
  29. 10
  30. 20
  31. 75
  32. 75
  33. 5
  34. 45
  35. 120
  36. 55
  37. 90
  38. 140
  39. 5
  40. Acute

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