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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 695 · 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.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  2. 2.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  3. 3.Two angles of a triangle are 65° and 40°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 55° and 45°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 100° and 120°. 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.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 75° and 65°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  19. 19.Two angles of a triangle are 20° and 145°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  25. 25.Two angles of a triangle are 70° and 70°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  28. 28.An angle measures 115°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  29. 29.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 45° and 45°. What is the third angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 30° and 55°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  36. 36.An angle measures 85°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  37. 37.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 45° and 125°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. Straight
  3. 75
  4. 180
  5. 40
  6. 145
  7. 210
  8. 80
  9. 40
  10. 240
  11. 140
  12. 90
  13. 70
  14. 85
  15. 50
  16. 40
  17. 50
  18. 150
  19. 15
  20. 150
  21. 90
  22. 15
  23. 80
  24. 130
  25. 40
  26. 45
  27. 25
  28. Obtuse
  29. 85
  30. 90
  31. 200
  32. 95
  33. 75
  34. 40
  35. 105
  36. Acute
  37. 95
  38. 5
  39. 60
  40. 10

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