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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 446 · 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 together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.An angle measures 40°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  5. 5.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  8. 8.An angle measures 175°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  9. 9.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  13. 13.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  14. 14.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  15. 15.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 50° and 250°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 130°. What is the third angle (in degrees)?
  22. 22.An angle measures 140°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  29. 29.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  30. 30.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  32. 32.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  33. 33.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 20° and 110°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?

Answer key

  1. 60
  2. 95
  3. 180
  4. Acute
  5. 5
  6. 75
  7. Straight
  8. Obtuse
  9. 80
  10. 190
  11. 125
  12. 60
  13. Obtuse
  14. Right
  15. 30
  16. 90
  17. 250
  18. 30
  19. 60
  20. 50
  21. 140
  22. Obtuse
  23. 35
  24. 165
  25. 150
  26. 200
  27. 90
  28. 25
  29. Acute
  30. 150
  31. 60
  32. Acute
  33. 15
  34. 10
  35. 90
  36. 20
  37. 135
  38. 50
  39. 130
  40. 30

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