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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 252 · 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 25°. What is the other angle (in degrees)?
  2. 2.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  3. 3.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  6. 6.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  10. 10.Three angles meet at a point. Two of them are 90° and 100°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 90° and 120°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 70° and 70°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 110° and 160°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 90°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 70°. What is the third angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  19. 19.An angle measures 120°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  20. 20.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 95° and 80°. What is the third angle (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 100° and 150°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 120° and 100°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 60° and 80°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  31. 31.An angle measures 75°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  32. 32.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  33. 33.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  35. 35.An angle measures 100°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  36. 36.Three angles meet at a point. Two of them are 50° and 70°. 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.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?

Answer key

  1. 155
  2. 75
  3. 65
  4. 55
  5. Straight
  6. 140
  7. 200
  8. 15
  9. 150
  10. 170
  11. 150
  12. 220
  13. 90
  14. 160
  15. 160
  16. 200
  17. 90
  18. 10
  19. Obtuse
  20. 125
  21. 95
  22. 5
  23. 110
  24. 150
  25. 150
  26. 140
  27. 220
  28. 85
  29. 20
  30. 145
  31. Acute
  32. Right
  33. 25
  34. 45
  35. Obtuse
  36. 240
  37. 140
  38. 30
  39. 70
  40. 140

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