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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 466 · 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.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 50° and 70°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  7. 7.A right angle is split into two angles. One of them is 50°. What is the other 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.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  10. 10.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  11. 11.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 100° and 30°. What is the third angle (in degrees)?
  14. 14.An angle measures 130°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  16. 16.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  17. 17.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  21. 21.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  24. 24.An angle measures 30°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  25. 25.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  40. 40.An angle measures 170°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse

Answer key

  1. 180
  2. 240
  3. 25
  4. 240
  5. 75
  6. Straight
  7. 40
  8. 55
  9. Right
  10. 120
  11. 90
  12. 150
  13. 50
  14. Obtuse
  15. 100
  16. Acute
  17. 65
  18. 90
  19. 15
  20. 85
  21. Acute
  22. 10
  23. 30
  24. Acute
  25. 55
  26. 35
  27. 60
  28. 95
  29. 90
  30. 130
  31. 30
  32. 85
  33. 160
  34. 50
  35. 20
  36. 60
  37. 90
  38. 90
  39. 100
  40. Obtuse

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