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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 561 · 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.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  2. 2.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 100°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 90° and 20°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  16. 16.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 50° and 150°. What is the third angle (in degrees)?
  19. 19.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  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 of a triangle are 85° and 85°. What is the third angle (in degrees)?
  22. 22.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  23. 23.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 55° and 60°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  31. 31.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  32. 32.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 80° and 190°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  40. 40.An angle measures 50°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight

Answer key

  1. Obtuse
  2. 80
  3. 170
  4. 15
  5. 120
  6. 140
  7. 210
  8. 55
  9. 90
  10. 120
  11. 70
  12. 60
  13. 125
  14. 25
  15. 30
  16. Right
  17. 60
  18. 160
  19. Obtuse
  20. 50
  21. 10
  22. Straight
  23. 50
  24. 170
  25. 25
  26. 85
  27. 25
  28. 120
  29. 65
  30. 50
  31. Acute
  32. 75
  33. 90
  34. 180
  35. 10
  36. 90
  37. 55
  38. 60
  39. 15
  40. Acute

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