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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 645 · 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 160°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  3. 3.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 95° and 20°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  8. 8.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  9. 9.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (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.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  12. 12.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  13. 13.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  15. 15.Two angles of a triangle are 40° and 50°. What is the third angle (in degrees)?
  16. 16.An angle measures 65°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  17. 17.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  21. 21.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 60° and 70°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 100° and 20°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  25. 25.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 45° and 130°. What is the third angle (in degrees)?
  28. 28.An angle measures 165°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  29. 29.Three angles meet at a point. Two of them are 70° and 200°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  32. 32.Two angles of a triangle are 45° and 110°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 210°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?

Answer key

  1. 20
  2. 130
  3. Right
  4. 100
  5. 65
  6. 80
  7. 25
  8. Straight
  9. 80
  10. 140
  11. 100
  12. 150
  13. 40
  14. 50
  15. 90
  16. Acute
  17. 50
  18. 70
  19. 80
  20. 130
  21. 65
  22. 50
  23. 60
  24. 10
  25. 165
  26. 25
  27. 5
  28. Obtuse
  29. 90
  30. 150
  31. 30
  32. 25
  33. 120
  34. 150
  35. 150
  36. 125
  37. 90
  38. 30
  39. 55
  40. 120

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