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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 600 · 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.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  6. 6.An angle measures 145°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  8. 8.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 50° and 85°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  17. 17.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  18. 18.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  21. 21.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  22. 22.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 70° and 210°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 70° and 40°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.An angle measures 35°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  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 45° and 55°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  38. 38.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  39. 39.Three angles meet at a point. Two of them are 50° and 170°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?

Answer key

  1. 90
  2. 85
  3. Acute
  4. 55
  5. 100
  6. Obtuse
  7. Straight
  8. 150
  9. 180
  10. 45
  11. 120
  12. 80
  13. 40
  14. 110
  15. 240
  16. 155
  17. Obtuse
  18. 125
  19. 105
  20. 170
  21. Right
  22. 65
  23. 30
  24. 55
  25. 80
  26. 45
  27. 150
  28. 70
  29. 150
  30. 70
  31. 90
  32. Acute
  33. 170
  34. 80
  35. 65
  36. 110
  37. 35
  38. Acute
  39. 140
  40. 120

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