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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 581 · 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.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 65° and 80°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  12. 12.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  13. 13.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 120°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 35° and 115°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  26. 26.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 40° and 120°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  34. 34.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  35. 35.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  36. 36.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  37. 37.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  38. 38.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  40. 40.An angle measures 100°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute

Answer key

  1. 30
  2. 105
  3. 70
  4. 35
  5. 80
  6. 160
  7. 90
  8. 150
  9. 60
  10. 30
  11. Right
  12. Straight
  13. 20
  14. 155
  15. 45
  16. 180
  17. 35
  18. 110
  19. 30
  20. 65
  21. 30
  22. 150
  23. 120
  24. 80
  25. 40
  26. 20
  27. 60
  28. 65
  29. 115
  30. 20
  31. 85
  32. 20
  33. 130
  34. Acute
  35. 120
  36. Acute
  37. Acute
  38. 100
  39. 95
  40. Obtuse

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