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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 476 · 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 90° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  4. 4.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  6. 6.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  12. 12.Two angles of a triangle are 30° and 120°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  16. 16.An angle measures 155°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  17. 17.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  19. 19.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  20. 20.An angle measures 125°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  21. 21.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 70° and 80°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  30. 30.An angle measures 55°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  31. 31.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 75° and 90°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  39. 39.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  40. 40.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 170
  2. 25
  3. 80
  4. Acute
  5. Right
  6. 70
  7. 70
  8. 150
  9. 60
  10. 35
  11. 60
  12. 30
  13. 30
  14. 65
  15. 135
  16. Obtuse
  17. 30
  18. Straight
  19. 180
  20. Obtuse
  21. 50
  22. 150
  23. 20
  24. 20
  25. 55
  26. 30
  27. 90
  28. 40
  29. 25
  30. Acute
  31. 90
  32. 200
  33. 10
  34. 105
  35. 20
  36. 60
  37. 15
  38. 30
  39. Obtuse
  40. 75

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