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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 328 · 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 50°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  3. 3.Two angles of a triangle are 100° and 55°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 70° and 105°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  6. 6.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 50° and 75°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 45° and 20°. What is the third 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.Two angles of a triangle are 30° and 70°. What is the third angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 150° and 150°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 65° and 55°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 55°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  26. 26.An angle measures 130°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  27. 27.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 125°. What is the third angle (in degrees)?
  30. 30.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  31. 31.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  33. 33.Two angles of a triangle are 20° and 40°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 120° and 110°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  38. 38.An angle measures 40°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  39. 39.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?

Answer key

  1. 40
  2. 80
  3. 25
  4. 5
  5. Straight
  6. 170
  7. 90
  8. 55
  9. 115
  10. 25
  11. 80
  12. 125
  13. 155
  14. 60
  15. 30
  16. 160
  17. 145
  18. 100
  19. 230
  20. 70
  21. 60
  22. 100
  23. 60
  24. 140
  25. 90
  26. Obtuse
  27. 65
  28. 20
  29. 20
  30. Right
  31. 75
  32. 150
  33. 120
  34. 130
  35. 50
  36. 220
  37. 140
  38. Acute
  39. 95
  40. 60

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