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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 43 · 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 85° and 70°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  4. 4.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 25° and 145°. What is the third angle (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 of a triangle are 55° and 65°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 85°. What is the other 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.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  29. 29.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  37. 37.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  38. 38.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 60
  3. Straight
  4. 60
  5. 120
  6. 50
  7. 60
  8. 30
  9. 60
  10. 100
  11. 100
  12. 65
  13. 10
  14. 80
  15. 115
  16. 65
  17. 65
  18. Right
  19. 150
  20. 30
  21. 10
  22. 20
  23. 60
  24. 40
  25. 155
  26. 95
  27. 70
  28. Acute
  29. 230
  30. 120
  31. 35
  32. 60
  33. 90
  34. 90
  35. 85
  36. 30
  37. Acute
  38. 75
  39. 190
  40. 50

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