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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 503 · 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 together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  2. 2.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  3. 3.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  5. 5.Two angles of a triangle are 70° and 65°. What is the third angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  7. 7.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  8. 8.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 80° and 210°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  13. 13.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  14. 14.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 20°. 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.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 90°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 85°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  31. 31.An angle measures 110°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  32. 32.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 75° and 70°. What is the third angle (in degrees)?
  37. 37.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 60° and 220°. What is the third angle (in degrees)?

Answer key

  1. 120
  2. Obtuse
  3. 165
  4. 70
  5. 45
  6. Right
  7. 25
  8. 90
  9. 65
  10. 75
  11. 70
  12. 90
  13. 5
  14. 85
  15. 70
  16. 10
  17. 120
  18. 140
  19. 80
  20. 135
  21. 30
  22. 150
  23. 150
  24. 120
  25. 130
  26. 65
  27. 130
  28. 60
  29. 155
  30. 55
  31. Obtuse
  32. 85
  33. 95
  34. 20
  35. 50
  36. 35
  37. 180
  38. 70
  39. 35
  40. 80

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