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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 401 · 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 25°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  2. 2.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  4. 4.An angle measures 15°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  5. 5.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  8. 8.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 60° and 50°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  22. 22.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  26. 26.An angle measures 135°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  27. 27.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 80° and 180°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  31. 31.Two angles of a triangle are 25° and 65°. What is the third angle (in degrees)?
  32. 32.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  33. 33.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 20° and 75°. What is the third angle (in degrees)?
  35. 35.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  36. 36.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?

Answer key

  1. Acute
  2. 65
  3. 90
  4. Acute
  5. 35
  6. 120
  7. Straight
  8. 55
  9. 180
  10. 45
  11. 100
  12. 70
  13. 70
  14. 155
  15. 65
  16. 80
  17. 130
  18. 160
  19. 15
  20. 250
  21. 85
  22. 60
  23. 150
  24. 135
  25. 35
  26. Obtuse
  27. 90
  28. 10
  29. 100
  30. 35
  31. 90
  32. Acute
  33. 110
  34. 85
  35. Acute
  36. 20
  37. 220
  38. 90
  39. 90
  40. 75

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