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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 824 · 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.An angle measures 65°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  2. 2.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  3. 3.An angle measures 160°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  5. 5.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  9. 9.An angle measures 145°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  10. 10.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  15. 15.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  16. 16.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  17. 17.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  18. 18.An angle measures 100°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  19. 19.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 20° and 150°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  28. 28.An angle measures 30°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  29. 29.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 160°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 25° and 125°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 80° and 40°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  39. 39.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  40. 40.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 150
  3. Obtuse
  4. Right
  5. 65
  6. 5
  7. 130
  8. 80
  9. Obtuse
  10. 125
  11. 150
  12. 155
  13. 60
  14. 60
  15. Acute
  16. Straight
  17. 105
  18. Obtuse
  19. 90
  20. 90
  21. 120
  22. 10
  23. 110
  24. 50
  25. 45
  26. 65
  27. 130
  28. Acute
  29. 90
  30. 90
  31. 70
  32. 20
  33. 130
  34. 30
  35. 15
  36. 35
  37. 60
  38. 190
  39. Obtuse
  40. 45

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