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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 171 · 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 7 o'clock (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.An angle measures 35°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  10. 10.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 80°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  15. 15.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  16. 16.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  17. 17.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  18. 18.Three angles meet at a point. Two of them are 110° and 80°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 60°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  37. 37.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  38. 38.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?
  40. 40.An angle measures 110°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse

Answer key

  1. 150
  2. 80
  3. 130
  4. 155
  5. 60
  6. 50
  7. 65
  8. 70
  9. Acute
  10. 15
  11. 160
  12. 90
  13. 190
  14. 105
  15. Obtuse
  16. Acute
  17. Straight
  18. 170
  19. 120
  20. 90
  21. 150
  22. 55
  23. 15
  24. 45
  25. 95
  26. 65
  27. 40
  28. 15
  29. 180
  30. 10
  31. 70
  32. 90
  33. 75
  34. 70
  35. 110
  36. 10
  37. Right
  38. 75
  39. 20
  40. Obtuse

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