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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 827 · 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 95°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 80° and 45°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  8. 8.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 150°. What is the other angle (in degrees)?
  10. 10.Two angles of a triangle are 50° and 125°. What is the third angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 30° and 30°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  16. 16.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 95° and 75°. What is the third angle (in degrees)?
  22. 22.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  23. 23.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  25. 25.An angle measures 60°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  26. 26.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  27. 27.Two angles of a triangle are 40° and 115°. What is the third angle (in degrees)?
  28. 28.An angle measures 10°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  29. 29.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  31. 31.An angle measures 110°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  32. 32.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 130°. What is the third angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  36. 36.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  37. 37.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  38. 38.An angle measures 85°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  39. 39.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?

Answer key

  1. 85
  2. 55
  3. 70
  4. 90
  5. 170
  6. 160
  7. 130
  8. 80
  9. 30
  10. 5
  11. 60
  12. 40
  13. 65
  14. 120
  15. 60
  16. 45
  17. 80
  18. 155
  19. 120
  20. 105
  21. 10
  22. Acute
  23. 120
  24. 30
  25. Acute
  26. Straight
  27. 25
  28. Acute
  29. 120
  30. 170
  31. Obtuse
  32. 170
  33. 100
  34. 85
  35. 30
  36. Right
  37. 50
  38. Acute
  39. 80
  40. 15

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