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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 558 · 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  2. 2.An angle measures 110°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  6. 6.An angle measures 170°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.Two angles of a triangle are 95° and 35°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.An angle measures 50°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  19. 19.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  29. 29.An angle measures 165°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  30. 30.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 100°. 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.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 55°. 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.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. Obtuse
  3. 90
  4. 60
  5. 30
  6. Obtuse
  7. 50
  8. 200
  9. 30
  10. 130
  11. 75
  12. 115
  13. 30
  14. 150
  15. 120
  16. Acute
  17. 45
  18. Right
  19. 50
  20. 60
  21. 40
  22. 15
  23. 250
  24. 190
  25. 10
  26. 120
  27. 110
  28. 10
  29. Obtuse
  30. 80
  31. 80
  32. 60
  33. 105
  34. 20
  35. 90
  36. 25
  37. 20
  38. 90
  39. 65
  40. 130

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