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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 80 · 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 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  2. 2.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  8. 8.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 85° and 70°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  22. 22.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  23. 23.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  28. 28.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.Two angles of a triangle are 80° and 85°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 75° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 45° and 85°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  39. 39.An angle measures 135°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?

Answer key

  1. Obtuse
  2. 120
  3. 35
  4. 90
  5. 100
  6. 150
  7. Straight
  8. 25
  9. 145
  10. 25
  11. 85
  12. 25
  13. 110
  14. 40
  15. 90
  16. 60
  17. 15
  18. 90
  19. 65
  20. 30
  21. 150
  22. Right
  23. 60
  24. 155
  25. 220
  26. 130
  27. 30
  28. Acute
  29. 15
  30. 30
  31. 40
  32. 60
  33. 60
  34. 95
  35. 180
  36. 60
  37. 50
  38. 20
  39. Obtuse
  40. 20

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