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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 64 · 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.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 40° and 125°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 130°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 30° and 140°. What is the third angle (in degrees)?
  18. 18.An angle measures 160°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  25. 25.An angle measures 150°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  26. 26.An angle measures 115°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  27. 27.An angle measures 10°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  28. 28.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  32. 32.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  35. 35.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 100° and 65°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 120°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?

Answer key

  1. 160
  2. 30
  3. 100
  4. 15
  5. 180
  6. 160
  7. 190
  8. 20
  9. 155
  10. 35
  11. 130
  12. 85
  13. 150
  14. 75
  15. 160
  16. 105
  17. 10
  18. Obtuse
  19. 40
  20. 120
  21. 60
  22. 50
  23. 90
  24. 150
  25. Obtuse
  26. Obtuse
  27. Acute
  28. 70
  29. 85
  30. 60
  31. 95
  32. Right
  33. 105
  34. Straight
  35. 35
  36. 15
  37. 80
  38. 90
  39. 25
  40. 80

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