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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 468 · 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 150° and 80°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 110° and 60°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  4. 4.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  8. 8.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 55° and 80°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  21. 21.Two angles of a triangle are 65° and 70°. What is the third angle (in degrees)?
  22. 22.An angle measures 150°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  23. 23.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  25. 25.An angle measures 45°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  29. 29.An angle measures 55°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  30. 30.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 50° and 110°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  34. 34.An angle measures 170°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  35. 35.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  36. 36.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?

Answer key

  1. 130
  2. 190
  3. Straight
  4. 65
  5. 160
  6. 110
  7. 150
  8. 60
  9. 30
  10. 40
  11. 120
  12. 55
  13. 45
  14. 65
  15. 90
  16. 85
  17. 60
  18. 65
  19. 85
  20. 180
  21. 45
  22. Obtuse
  23. 60
  24. 30
  25. Acute
  26. 50
  27. 30
  28. 60
  29. Acute
  30. 105
  31. 200
  32. 105
  33. 190
  34. Obtuse
  35. 75
  36. Acute
  37. 20
  38. 125
  39. 90
  40. 80

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