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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 888 · 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.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  2. 2.Two angles of a triangle are 65° and 35°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 60° and 95°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  6. 6.Two angles of a triangle are 65° and 65°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.Three angles meet at a point. Two of them are 150° and 50°. What is the third angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 80° and 110°. What is the third angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 110°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 90° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 25° and 40°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  23. 23.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  24. 24.An angle measures 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  25. 25.Two angles of a triangle are 25° and 120°. What is the third angle (in degrees)?
  26. 26.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.Two angles of a triangle are 20° and 125°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 60° and 25°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  36. 36.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  37. 37.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?
  40. 40.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight

Answer key

  1. Straight
  2. 80
  3. 25
  4. 150
  5. 90
  6. 50
  7. 25
  8. 160
  9. 120
  10. 30
  11. 115
  12. 170
  13. 180
  14. 40
  15. 180
  16. 180
  17. 60
  18. 115
  19. 20
  20. 100
  21. 35
  22. 10
  23. Right
  24. Acute
  25. 35
  26. Obtuse
  27. 35
  28. 60
  29. 70
  30. 95
  31. 75
  32. 55
  33. 45
  34. 150
  35. 160
  36. Obtuse
  37. 30
  38. 155
  39. 90
  40. Obtuse

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