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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 226 · 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.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  9. 9.Two angles of a triangle are 70° and 30°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  11. 11.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 80° and 220°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 100° and 170°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  19. 19.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  20. 20.Two angles of a triangle are 45° and 120°. What is the third angle (in degrees)?
  21. 21.An angle measures 150°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 20° and 25°. What is the third angle (in degrees)?
  24. 24.An angle measures 60°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  25. 25.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 140° and 160°. What is the third angle (in degrees)?
  30. 30.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  31. 31.An angle measures 130°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  32. 32.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  35. 35.An angle measures 50°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  36. 36.Two angles of a triangle are 45° and 60°. What is the third angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  38. 38.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 100° and 60°. What is the third angle (in degrees)?

Answer key

  1. 220
  2. 105
  3. 55
  4. 30
  5. Straight
  6. 120
  7. 90
  8. 170
  9. 80
  10. 80
  11. 180
  12. 35
  13. 60
  14. 90
  15. 150
  16. 35
  17. 40
  18. 5
  19. Acute
  20. 15
  21. Obtuse
  22. 70
  23. 135
  24. Acute
  25. 110
  26. 140
  27. 15
  28. 60
  29. 60
  30. Right
  31. Obtuse
  32. 90
  33. 60
  34. 40
  35. Acute
  36. 75
  37. 65
  38. 30
  39. 120
  40. 20

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