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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 624 · 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.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  2. 2.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 60° and 110°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 140°. What is the other 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 135°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  17. 17.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 35° and 30°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 90°. 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.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  32. 32.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  33. 33.Three angles meet at a point. Two of them are 80° and 120°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  38. 38.An angle measures 125°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  39. 39.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 120
  2. 50
  3. 190
  4. 40
  5. 120
  6. 45
  7. 150
  8. 90
  9. 140
  10. 150
  11. 5
  12. 30
  13. 75
  14. 155
  15. Right
  16. Straight
  17. 125
  18. 210
  19. 25
  20. 85
  21. Acute
  22. 170
  23. 45
  24. 20
  25. 115
  26. 90
  27. 150
  28. 20
  29. 20
  30. 30
  31. 260
  32. Obtuse
  33. 160
  34. 70
  35. 95
  36. 80
  37. 75
  38. Obtuse
  39. 60
  40. 75

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