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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 185 · 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 of a triangle are 45° and 100°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  3. 3.An angle measures 85°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  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 130° and 160°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  10. 10.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  16. 16.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 60° and 170°. What is the third angle (in degrees)?
  19. 19.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.Three angles meet at a point. Two of them are 70° and 230°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 95° and 55°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 50° and 230°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (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 of a triangle are 75° and 70°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 15°. What is the other 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.An angle measures 50°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  36. 36.Two angles of a triangle are 20° and 120°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 95° and 60°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 90° and 60°. What is the third angle (in degrees)?

Answer key

  1. 35
  2. 155
  3. Acute
  4. 115
  5. 70
  6. 45
  7. 25
  8. 70
  9. 150
  10. Obtuse
  11. 90
  12. 70
  13. 10
  14. 180
  15. 110
  16. 20
  17. 150
  18. 130
  19. Right
  20. 60
  21. 30
  22. 60
  23. 160
  24. 30
  25. 80
  26. 140
  27. 120
  28. 35
  29. 80
  30. 150
  31. 20
  32. 85
  33. 75
  34. 35
  35. Acute
  36. 40
  37. 55
  38. 60
  39. 25
  40. 210

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