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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 342 · 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 90° and 55°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  7. 7.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  8. 8.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 70° and 20°. What is the third angle (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.Two angles of a triangle are 90° and 65°. What is the third angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 90° and 50°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  35. 35.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  40. 40.An angle measures 125°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse

Answer key

  1. 35
  2. 100
  3. 55
  4. 160
  5. 30
  6. Right
  7. Obtuse
  8. 140
  9. 70
  10. 120
  11. 170
  12. 150
  13. 35
  14. 90
  15. 85
  16. 25
  17. 140
  18. 85
  19. 60
  20. 60
  21. 60
  22. 140
  23. 40
  24. 70
  25. 25
  26. 50
  27. 40
  28. 180
  29. 230
  30. 60
  31. 210
  32. 200
  33. 65
  34. Straight
  35. 110
  36. 90
  37. 110
  38. 120
  39. 30
  40. Obtuse

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