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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 547 · 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 of a triangle are 85° and 75°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  4. 4.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  7. 7.An angle measures 40°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  8. 8.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 105°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 30° and 75°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  18. 18.An angle measures 75°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  19. 19.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  20. 20.An angle measures 125°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  21. 21.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  24. 24.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  25. 25.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.An angle measures 105°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  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 60° and 65°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?

Answer key

  1. 20
  2. 170
  3. Right
  4. 60
  5. 55
  6. 75
  7. Acute
  8. 160
  9. 220
  10. 30
  11. 55
  12. 130
  13. 30
  14. 75
  15. 180
  16. 160
  17. 120
  18. Acute
  19. 60
  20. Obtuse
  21. 30
  22. 90
  23. Acute
  24. Straight
  25. 65
  26. 80
  27. 65
  28. 170
  29. 120
  30. 90
  31. 180
  32. Obtuse
  33. 150
  34. 55
  35. 180
  36. 10
  37. 165
  38. 40
  39. 75
  40. 60

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