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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 723 · 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 170°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 25° and 130°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  12. 12.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  19. 19.An angle measures 85°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.An angle measures 80°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  22. 22.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  24. 24.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  25. 25.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  28. 28.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  29. 29.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  32. 32.An angle measures 50°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  33. 33.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  35. 35.An angle measures 120°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 100° and 50°. What is the third angle (in degrees)?
  37. 37.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  38. 38.Two angles of a triangle are 35° and 100°. What is the third angle (in degrees)?
  39. 39.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  40. 40.Three angles meet at a point. Two of them are 140° and 130°. What is the third angle (in degrees)?

Answer key

  1. 10
  2. 45
  3. 40
  4. 25
  5. 100
  6. 130
  7. 55
  8. 150
  9. 25
  10. 90
  11. Right
  12. 190
  13. 155
  14. 90
  15. 30
  16. 45
  17. 180
  18. 135
  19. Acute
  20. 85
  21. Acute
  22. 70
  23. 90
  24. Obtuse
  25. 90
  26. 30
  27. 130
  28. Acute
  29. 30
  30. 80
  31. 100
  32. Acute
  33. 150
  34. 220
  35. Obtuse
  36. 210
  37. Obtuse
  38. 45
  39. Straight
  40. 90

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