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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 619 · 40 sums
TalentJR

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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 45° and 80°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  29. 29.An angle measures 105°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  30. 30.Two angles of a triangle are 55° and 50°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  37. 37.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  38. 38.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?

Answer key

  1. 70
  2. 70
  3. 30
  4. 90
  5. 140
  6. 45
  7. 170
  8. 60
  9. 55
  10. 60
  11. Acute
  12. 65
  13. 50
  14. 50
  15. 150
  16. 15
  17. 120
  18. 35
  19. 55
  20. 240
  21. 40
  22. 160
  23. 120
  24. 125
  25. 60
  26. 120
  27. 60
  28. 140
  29. Obtuse
  30. 75
  31. 75
  32. 90
  33. 140
  34. 15
  35. 70
  36. 65
  37. Right
  38. 30
  39. 105
  40. 145

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