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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 539 · 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 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  2. 2.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 135°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  10. 10.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 80°. What is the third angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  19. 19.Three angles meet at a point. Two of them are 110° and 110°. What is the third angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  25. 25.Two angles of a triangle are 30° and 35°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 30° and 110°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 25° and 50°. What is the third angle (in degrees)?
  28. 28.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  29. 29.An angle measures 180°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  30. 30.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 30° and 40°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 170°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. Acute
  3. 180
  4. 35
  5. 40
  6. 105
  7. 160
  8. 45
  9. 150
  10. Acute
  11. 170
  12. 20
  13. 35
  14. 70
  15. 65
  16. 65
  17. 155
  18. 75
  19. 140
  20. 120
  21. 50
  22. 135
  23. 55
  24. 60
  25. 115
  26. 40
  27. 105
  28. 55
  29. Straight
  30. 65
  31. 60
  32. 60
  33. 100
  34. 110
  35. 105
  36. 15
  37. 80
  38. 220
  39. 70
  40. 130

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