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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 497 · 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 50°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 130° and 170°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 30° and 90°. What is the third angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  8. 8.An angle measures 105°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  9. 9.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 95° and 30°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 85° and 75°. What is the third angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 70° and 45°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  24. 24.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  29. 29.An angle measures 10°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  30. 30.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  32. 32.Two angles of a triangle are 20° and 20°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 45° and 40°. What is the third angle (in degrees)?
  36. 36.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  37. 37.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?

Answer key

  1. 130
  2. 60
  3. 60
  4. 35
  5. 85
  6. 60
  7. 160
  8. Obtuse
  9. 190
  10. 5
  11. 50
  12. 60
  13. 55
  14. 60
  15. 20
  16. 50
  17. 165
  18. 65
  19. 5
  20. 200
  21. 40
  22. 135
  23. Right
  24. 85
  25. 90
  26. 90
  27. 120
  28. 125
  29. Acute
  30. 65
  31. 140
  32. 140
  33. 10
  34. 120
  35. 95
  36. Acute
  37. 130
  38. 145
  39. 150
  40. 100

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