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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 928 · 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 30°. What is the other angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 150°. 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.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  8. 8.An angle measures 45°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  9. 9.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 150° and 80°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 80° and 200°. What is the third angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  25. 25.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  26. 26.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 105°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  31. 31.Two angles of a triangle are 25° and 25°. What is the third angle (in degrees)?
  32. 32.An angle measures 20°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  33. 33.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  34. 34.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  35. 35.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  37. 37.An angle measures 135°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  38. 38.Two angles of a triangle are 75° and 80°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?

Answer key

  1. 150
  2. 30
  3. 60
  4. 230
  5. 80
  6. 140
  7. 50
  8. Acute
  9. Right
  10. 75
  11. 45
  12. 20
  13. 25
  14. 160
  15. 145
  16. 80
  17. 130
  18. 90
  19. 80
  20. 85
  21. 30
  22. 55
  23. 10
  24. 120
  25. Obtuse
  26. 35
  27. 25
  28. 35
  29. 40
  30. 120
  31. 130
  32. Acute
  33. 110
  34. Straight
  35. 60
  36. 80
  37. Obtuse
  38. 25
  39. 60
  40. 150

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