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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 625 · 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.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  7. 7.Two angles of a triangle are 55° and 30°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 20° and 35°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 85° and 35°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. 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 170°. What is the other angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  20. 20.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 120° and 120°. What is the third angle (in degrees)?
  22. 22.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  23. 23.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  24. 24.Two angles of a triangle are 45° and 75°. What is the third angle (in degrees)?
  25. 25.An angle measures 65°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  26. 26.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  35. 35.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  36. 36.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 60°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?

Answer key

  1. 40
  2. 150
  3. Right
  4. 60
  5. 100
  6. 200
  7. 95
  8. 165
  9. 90
  10. 140
  11. 125
  12. 25
  13. 60
  14. 50
  15. 30
  16. 65
  17. 170
  18. 10
  19. Straight
  20. 150
  21. 120
  22. Obtuse
  23. 60
  24. 60
  25. Acute
  26. 50
  27. 60
  28. 45
  29. 160
  30. 90
  31. 75
  32. 120
  33. 130
  34. 120
  35. 60
  36. 5
  37. 60
  38. 25
  39. 40
  40. 70

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