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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 150 · 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 9 o'clock (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  7. 7.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 15°. What is the other 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.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  25. 25.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  26. 26.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 115°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 100°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 65°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  40. 40.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute

Answer key

  1. 90
  2. 130
  3. 100
  4. 190
  5. 90
  6. Right
  7. 125
  8. 90
  9. 95
  10. 35
  11. 165
  12. 115
  13. 100
  14. 150
  15. 60
  16. 230
  17. 70
  18. 40
  19. 120
  20. 60
  21. 75
  22. 150
  23. 55
  24. 120
  25. Straight
  26. 75
  27. 65
  28. 10
  29. 25
  30. 30
  31. 130
  32. 20
  33. 170
  34. 5
  35. 80
  36. 60
  37. 70
  38. 95
  39. 130
  40. Obtuse

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