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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 483 · 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 100°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 95° and 40°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  6. 6.An angle measures 155°. 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 15°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  16. 16.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 85° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 50° and 60°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  21. 21.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  22. 22.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  25. 25.An angle measures 70°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  26. 26.An angle measures 15°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  27. 27.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  32. 32.An angle measures 50°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  33. 33.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  38. 38.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  39. 39.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  40. 40.Two angles of a triangle are 50° and 110°. What is the third angle (in degrees)?

Answer key

  1. 200
  2. 105
  3. 45
  4. 60
  5. 45
  6. Obtuse
  7. 165
  8. 120
  9. 80
  10. 90
  11. 170
  12. 100
  13. 130
  14. 180
  15. 85
  16. Obtuse
  17. 60
  18. 35
  19. 70
  20. 35
  21. Obtuse
  22. 110
  23. Right
  24. 110
  25. Acute
  26. Acute
  27. 70
  28. 70
  29. 55
  30. 5
  31. 10
  32. Acute
  33. 30
  34. 230
  35. 30
  36. 70
  37. 100
  38. Obtuse
  39. Straight
  40. 20

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