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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 375 · 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.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  2. 2.An angle measures 25°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  3. 3.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 25° and 20°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 130°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  15. 15.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 70° and 80°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other 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.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  23. 23.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 150° and 60°. What is the third angle (in degrees)?
  29. 29.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  30. 30.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  31. 31.An angle measures 135°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  32. 32.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  35. 35.An angle measures 160°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  36. 36.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 50° and 50°. What is the third angle (in degrees)?
  40. 40.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight

Answer key

  1. 170
  2. Acute
  3. 145
  4. 30
  5. 150
  6. 130
  7. 45
  8. 50
  9. 135
  10. 90
  11. 70
  12. 150
  13. 160
  14. Right
  15. 220
  16. 10
  17. 40
  18. 25
  19. 30
  20. 50
  21. 140
  22. Obtuse
  23. 60
  24. 170
  25. 55
  26. 70
  27. 55
  28. 150
  29. Straight
  30. 30
  31. Obtuse
  32. 80
  33. 110
  34. 45
  35. Obtuse
  36. 75
  37. 15
  38. 120
  39. 80
  40. Obtuse

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