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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 944 · 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 60°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  5. 5.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  6. 6.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  12. 12.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  15. 15.An angle measures 10°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  16. 16.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  27. 27.An angle measures 25°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  28. 28.An angle measures 100°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  29. 29.An angle measures 160°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  30. 30.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  35. 35.Two angles of a triangle are 70° and 25°. What is the third angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 100°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 30
  2. 25
  3. 160
  4. 55
  5. Right
  6. 20
  7. 70
  8. 60
  9. 210
  10. 15
  11. 30
  12. Acute
  13. 150
  14. 65
  15. Acute
  16. 75
  17. 60
  18. 200
  19. 90
  20. 35
  21. 5
  22. 180
  23. 90
  24. 145
  25. 160
  26. 120
  27. Acute
  28. Obtuse
  29. Obtuse
  30. 120
  31. 170
  32. 50
  33. 60
  34. 55
  35. 85
  36. 90
  37. 40
  38. 70
  39. 80
  40. 90

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