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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 27 · 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 150° and 150°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  4. 4.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  5. 5.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  10. 10.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 140° and 60°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  17. 17.An angle measures 165°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  20. 20.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  24. 24.Two angles of a triangle are 70° and 20°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  27. 27.An angle measures 120°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  28. 28.An angle measures 25°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  29. 29.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?

Answer key

  1. 90
  2. 60
  3. 50
  4. Obtuse
  5. 60
  6. 180
  7. 90
  8. 30
  9. 80
  10. Straight
  11. 90
  12. 160
  13. 180
  14. 130
  15. 120
  16. 110
  17. Obtuse
  18. 150
  19. Obtuse
  20. 20
  21. 140
  22. 35
  23. Right
  24. 90
  25. 75
  26. 5
  27. Obtuse
  28. Acute
  29. 70
  30. 155
  31. 130
  32. 65
  33. 70
  34. 45
  35. 15
  36. 60
  37. 30
  38. 15
  39. 240
  40. 125

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