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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 690 · 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 125°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  2. 2.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 120° and 140°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  7. 7.An angle measures 105°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  10. 10.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 75° and 30°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Two angles of a triangle are 100° and 70°. What is the third angle (in degrees)?
  16. 16.An angle measures 50°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  17. 17.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  18. 18.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  19. 19.Two angles of a triangle are 95° and 25°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  30. 30.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  31. 31.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  32. 32.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  35. 35.An angle measures 15°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  36. 36.Two angles of a triangle are 70° and 50°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 140°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  39. 39.An angle measures 165°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  40. 40.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 120
  3. 100
  4. 100
  5. 125
  6. 90
  7. Obtuse
  8. 100
  9. Right
  10. 50
  11. 30
  12. 30
  13. 75
  14. 30
  15. 10
  16. Acute
  17. 80
  18. Obtuse
  19. 60
  20. 60
  21. 40
  22. 55
  23. 35
  24. 170
  25. 70
  26. 50
  27. 140
  28. 180
  29. 140
  30. Straight
  31. Acute
  32. 240
  33. 150
  34. 50
  35. Acute
  36. 60
  37. 80
  38. 110
  39. Obtuse
  40. 230

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