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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 680 · 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 50° and 240°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  3. 3.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  8. 8.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  16. 16.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  17. 17.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 60° and 50°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  27. 27.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  28. 28.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 35° and 135°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 30
  3. 65
  4. 180
  5. 165
  6. 180
  7. Right
  8. 155
  9. 110
  10. 80
  11. 135
  12. 35
  13. 75
  14. 60
  15. 80
  16. Acute
  17. 90
  18. 80
  19. 35
  20. 60
  21. 60
  22. 100
  23. 150
  24. 70
  25. 60
  26. 100
  27. Straight
  28. 125
  29. 100
  30. 15
  31. 40
  32. 60
  33. 130
  34. 65
  35. 115
  36. 10
  37. 20
  38. 25
  39. 10
  40. 20

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