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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 414 · 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 of a triangle are 55° and 75°. What is the third angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  3. 3.An angle measures 75°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  4. 4.Two angles of a triangle are 95° and 45°. What is the third angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  6. 6.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 90° and 210°. What is the third angle (in degrees)?
  8. 8.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 80°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 40° and 55°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  23. 23.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  25. 25.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  33. 33.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  39. 39.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  40. 40.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?

Answer key

  1. 50
  2. 85
  3. Acute
  4. 40
  5. Right
  6. 80
  7. 60
  8. Acute
  9. 90
  10. 60
  11. 45
  12. 230
  13. 55
  14. 150
  15. 5
  16. 20
  17. 85
  18. 30
  19. 75
  20. 25
  21. 220
  22. 60
  23. Obtuse
  24. Straight
  25. 70
  26. 60
  27. 80
  28. 140
  29. 120
  30. 15
  31. 150
  32. Obtuse
  33. 5
  34. 40
  35. 105
  36. 155
  37. 180
  38. 150
  39. Acute
  40. 135

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