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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 329 · 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 75°. What is the other angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 20° and 100°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  5. 5.An angle measures 10°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  6. 6.Three angles meet at a point. Two of them are 130° and 60°. What is the third angle (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 40° and 50°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  10. 10.Two angles of a triangle are 45° and 55°. What is the third angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  12. 12.Two angles of a triangle are 85° and 20°. What is the third angle (in degrees)?
  13. 13.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  14. 14.Two angles of a triangle are 80° and 75°. What is the third angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Straight
  18. 18.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  19. 19.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 90° and 45°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  25. 25.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.Two angles of a triangle are 55° and 65°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 65° and 95°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 20° and 85°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 60° and 150°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 70° and 75°. What is the third angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  40. 40.An angle measures 15°. What kind of angle is it? (a) Acute (b) Right (c) Straight

Answer key

  1. 15
  2. 180
  3. 60
  4. 60
  5. Acute
  6. 170
  7. 70
  8. 90
  9. 90
  10. 80
  11. 190
  12. 75
  13. 150
  14. 25
  15. 30
  16. 170
  17. Right
  18. 170
  19. 75
  20. 120
  21. 45
  22. 95
  23. 120
  24. 20
  25. Straight
  26. 60
  27. 20
  28. 45
  29. 70
  30. 75
  31. 155
  32. 150
  33. 150
  34. 65
  35. 65
  36. 35
  37. 5
  38. 55
  39. 180
  40. Acute

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