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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 508 · 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 170°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 80° and 150°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 30° and 100°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 45° and 35°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  13. 13.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 70° and 50°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  16. 16.An angle measures 25°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  17. 17.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  20. 20.An angle measures 90°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  21. 21.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  37. 37.An angle measures 175°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  38. 38.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  39. 39.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 35° and 65°. What is the third angle (in degrees)?

Answer key

  1. 130
  2. 130
  3. 50
  4. 30
  5. 75
  6. 150
  7. 70
  8. 100
  9. 160
  10. 130
  11. Acute
  12. Acute
  13. 170
  14. 240
  15. 155
  16. Acute
  17. 80
  18. 120
  19. 90
  20. Right
  21. 65
  22. 60
  23. 85
  24. 100
  25. 85
  26. 60
  27. 60
  28. 160
  29. 45
  30. 150
  31. 115
  32. 100
  33. 110
  34. 50
  35. 180
  36. 25
  37. Obtuse
  38. Acute
  39. 105
  40. 80

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