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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 607 · 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 20°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  8. 8.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  12. 12.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  15. 15.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  18. 18.An angle measures 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  19. 19.Three angles meet at a point. Two of them are 50° and 60°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 60° and 160°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  24. 24.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  25. 25.Three angles meet at a point. Two of them are 120° and 60°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 55° and 85°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 75° and 90°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 80°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 240°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  38. 38.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  39. 39.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?

Answer key

  1. 30
  2. 70
  3. 55
  4. 60
  5. 115
  6. 90
  7. Straight
  8. 135
  9. 80
  10. 80
  11. 120
  12. 75
  13. 60
  14. Acute
  15. 5
  16. 10
  17. 20
  18. Obtuse
  19. 250
  20. 10
  21. 140
  22. 60
  23. Right
  24. Obtuse
  25. 180
  26. 50
  27. 40
  28. 15
  29. 80
  30. 125
  31. 90
  32. 150
  33. 190
  34. 35
  35. 180
  36. 70
  37. 230
  38. Obtuse
  39. 25
  40. 20

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