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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 350 · 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.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  4. 4.An angle measures 155°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  5. 5.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  6. 6.An angle measures 90°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  7. 7.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  9. 9.An angle measures 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  10. 10.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 80°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  27. 27.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 75° and 75°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 190°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?

Answer key

  1. 120
  2. 125
  3. Straight
  4. Obtuse
  5. 35
  6. Right
  7. 130
  8. 120
  9. Obtuse
  10. 65
  11. 20
  12. 60
  13. 30
  14. 30
  15. 250
  16. 95
  17. 45
  18. 55
  19. 135
  20. 20
  21. 25
  22. 90
  23. 5
  24. 85
  25. 30
  26. 10
  27. Acute
  28. 60
  29. 150
  30. 10
  31. 180
  32. 70
  33. 25
  34. 65
  35. 70
  36. 30
  37. 120
  38. 60
  39. 90
  40. 80

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