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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 182 · 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.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 90°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 150° and 120°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 60° and 60°. 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.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 55° and 25°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  18. 18.Two angles of a triangle are 55° and 35°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 60° and 100°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  22. 22.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  23. 23.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  25. 25.An angle measures 150°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 220°. What is the third angle (in degrees)?
  28. 28.An angle measures 135°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  29. 29.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  33. 33.An angle measures 105°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  34. 34.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?

Answer key

  1. 70
  2. 170
  3. 40
  4. 115
  5. 200
  6. 30
  7. 130
  8. 90
  9. 125
  10. 25
  11. 50
  12. 240
  13. 60
  14. 55
  15. 100
  16. 80
  17. 60
  18. 90
  19. 250
  20. 20
  21. 70
  22. Acute
  23. 135
  24. 160
  25. Obtuse
  26. 150
  27. 90
  28. Obtuse
  29. 85
  30. 110
  31. 120
  32. 75
  33. Obtuse
  34. 35
  35. 150
  36. 70
  37. 5
  38. 5
  39. 10
  40. 165

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