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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 551 · 40 sums
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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 105°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 90° and 170°. What is the third angle (in degrees)?
  5. 5.An angle measures 70°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  6. 6.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  7. 7.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  10. 10.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  16. 16.An angle measures 25°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  18. 18.An angle measures 125°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 90°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  26. 26.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  27. 27.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 110° and 100°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 85° and 45°. What is the third angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  35. 35.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 110°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 50° and 95°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. 60
  3. 230
  4. 100
  5. Acute
  6. Acute
  7. 100
  8. 60
  9. Right
  10. 60
  11. 150
  12. 190
  13. 120
  14. 70
  15. 30
  16. Acute
  17. 130
  18. Obtuse
  19. 20
  20. 40
  21. 180
  22. 30
  23. 140
  24. 240
  25. 130
  26. Obtuse
  27. 170
  28. 15
  29. 60
  30. 240
  31. 150
  32. 65
  33. 50
  34. Straight
  35. 100
  36. 25
  37. 30
  38. 35
  39. 80
  40. 70

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