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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 874 · 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 130°. What is the other angle (in degrees)?
  2. 2.An angle measures 90°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  3. 3.Two angles of a triangle are 60° and 40°. What is the third angle (in degrees)?
  4. 4.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  7. 7.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  9. 9.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  11. 11.An angle measures 170°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  12. 12.Two angles of a triangle are 40° and 35°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  15. 15.Two angles of a triangle are 35° and 75°. What is the third angle (in degrees)?
  16. 16.An angle measures 145°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  17. 17.Two angles of a triangle are 40° and 65°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 45° and 100°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.Two angles of a triangle are 65° and 50°. What is the third angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 10°. 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.Three angles meet at a point. Two of them are 50° and 130°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  27. 27.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  29. 29.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 50° and 160°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 55°. What is the other angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  36. 36.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  37. 37.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 80° and 20°. What is the third angle (in degrees)?

Answer key

  1. 50
  2. Right
  3. 80
  4. 110
  5. 45
  6. 40
  7. 85
  8. 70
  9. 180
  10. 130
  11. Obtuse
  12. 105
  13. 35
  14. 65
  15. 70
  16. Obtuse
  17. 75
  18. 35
  19. 115
  20. 150
  21. Straight
  22. 65
  23. 80
  24. 60
  25. 180
  26. 60
  27. 5
  28. 20
  29. 90
  30. 25
  31. 20
  32. 150
  33. 150
  34. 125
  35. 30
  36. 90
  37. 95
  38. 90
  39. 25
  40. 80

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