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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 316 · 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 10°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  4. 4.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  5. 5.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  10. 10.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  11. 11.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  17. 17.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  18. 18.An angle measures 15°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  19. 19.Two angles of a triangle are 40° and 90°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 130° and 90°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  23. 23.An angle measures 95°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  24. 24.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 75° and 25°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 65° and 45°. What is the third angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 120°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  36. 36.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  37. 37.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  38. 38.Two angles of a triangle are 55° and 40°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?

Answer key

  1. 80
  2. 135
  3. 60
  4. Straight
  5. 70
  6. 95
  7. Right
  8. 70
  9. 150
  10. Acute
  11. 30
  12. 5
  13. 120
  14. 120
  15. 100
  16. 105
  17. 150
  18. Acute
  19. 50
  20. 140
  21. 40
  22. 10
  23. Obtuse
  24. 155
  25. 90
  26. 80
  27. 70
  28. 150
  29. 25
  30. 15
  31. 70
  32. 85
  33. 150
  34. 100
  35. 80
  36. Acute
  37. 65
  38. 85
  39. 115
  40. 160

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