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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 842 · 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 135°. What is the other angle (in degrees)?
  2. 2.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  3. 3.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  7. 7.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  8. 8.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  9. 9.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  11. 11.Two angles of a triangle are 55° and 75°. What is the third angle (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 65°. What is the other angle (in degrees)?
  14. 14.An angle measures 145°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  15. 15.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 150°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  19. 19.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  20. 20.Two angles of a triangle are 60° and 65°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 45° and 65°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 60° and 75°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  29. 29.An angle measures 70°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  30. 30.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  32. 32.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  34. 34.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  40. 40.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse

Answer key

  1. 45
  2. Straight
  3. 100
  4. 145
  5. 30
  6. 75
  7. 90
  8. Right
  9. 65
  10. 30
  11. 50
  12. 40
  13. 25
  14. Obtuse
  15. 20
  16. 130
  17. 80
  18. 135
  19. 150
  20. 55
  21. 120
  22. 70
  23. 45
  24. 120
  25. 190
  26. 80
  27. 85
  28. 5
  29. Acute
  30. 50
  31. 120
  32. 155
  33. 180
  34. 90
  35. 40
  36. 150
  37. 70
  38. 180
  39. 110
  40. Acute

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