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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 356 · 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.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 100° and 190°. What is the third angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 120°. What is the third angle (in degrees)?
  16. 16.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 50° and 90°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  21. 21.Two angles of a triangle are 55° and 70°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  23. 23.An angle measures 85°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  24. 24.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  26. 26.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  27. 27.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  28. 28.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  29. 29.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  32. 32.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 20° and 90°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?

Answer key

  1. 220
  2. 60
  3. 70
  4. 120
  5. 70
  6. 5
  7. 90
  8. 90
  9. 140
  10. 60
  11. 15
  12. 160
  13. 60
  14. 150
  15. 180
  16. Straight
  17. 90
  18. 230
  19. 220
  20. 70
  21. 55
  22. 90
  23. Acute
  24. 80
  25. 100
  26. Obtuse
  27. 30
  28. Obtuse
  29. 160
  30. 90
  31. 45
  32. Obtuse
  33. 170
  34. 80
  35. 25
  36. 35
  37. 130
  38. 240
  39. 70
  40. 130

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