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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 864 · 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 70° and 80°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 50°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 40° and 40°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  14. 14.An angle measures 115°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  15. 15.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  16. 16.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  17. 17.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  21. 21.An angle measures 65°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.An angle measures 95°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  29. 29.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  34. 34.An angle measures 140°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  35. 35.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?

Answer key

  1. 210
  2. 100
  3. 100
  4. 90
  5. 25
  6. 20
  7. 80
  8. 100
  9. 20
  10. 100
  11. 40
  12. 45
  13. 30
  14. Obtuse
  15. Right
  16. Straight
  17. 75
  18. 35
  19. 55
  20. 15
  21. Acute
  22. 170
  23. 210
  24. 85
  25. 140
  26. 150
  27. 65
  28. Obtuse
  29. 25
  30. 90
  31. 60
  32. 140
  33. 110
  34. Obtuse
  35. 140
  36. 200
  37. 15
  38. 40
  39. 75
  40. 155

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