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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 333 · 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 50° and 105°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  6. 6.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  9. 9.Two angles of a triangle are 40° and 80°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  14. 14.An angle measures 120°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  15. 15.Two angles of a triangle are 65° and 30°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  30. 30.An angle measures 65°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  31. 31.Three angles meet at a point. Two of them are 110° and 50°. What is the third angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  37. 37.An angle measures 75°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  38. 38.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?

Answer key

  1. 25
  2. 120
  3. 240
  4. 150
  5. Obtuse
  6. Straight
  7. 90
  8. 180
  9. 60
  10. 55
  11. 5
  12. 85
  13. 80
  14. Obtuse
  15. 85
  16. 5
  17. 150
  18. 80
  19. 50
  20. 100
  21. 70
  22. 60
  23. 210
  24. 85
  25. 40
  26. 150
  27. 60
  28. 90
  29. 110
  30. Acute
  31. 200
  32. 170
  33. 155
  34. 40
  35. 250
  36. 75
  37. Acute
  38. 120
  39. 35
  40. 10

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