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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 325 · 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 25° and 105°. What is the third angle (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 80°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 35° and 125°. 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.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  9. 9.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.An angle measures 135°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  11. 11.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 95°. What is the third angle (in degrees)?
  20. 20.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  21. 21.Three angles meet at a point. Two of them are 100° and 140°. What is the third angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  24. 24.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  28. 28.Two angles of a triangle are 25° and 30°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  32. 32.An angle measures 100°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.An angle measures 165°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  35. 35.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 50
  3. 180
  4. 20
  5. Right
  6. 30
  7. 85
  8. 30
  9. Acute
  10. Obtuse
  11. 15
  12. 50
  13. 30
  14. 40
  15. 5
  16. 100
  17. 110
  18. 190
  19. 10
  20. Straight
  21. 120
  22. 25
  23. 55
  24. 110
  25. 60
  26. 60
  27. 180
  28. 125
  29. 150
  30. 90
  31. 75
  32. Obtuse
  33. 170
  34. Obtuse
  35. 60
  36. 120
  37. 45
  38. 45
  39. 40
  40. 45

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