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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 205 · 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 110°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 90° and 80°. What is the third angle (in degrees)?
  5. 5.An angle measures 165°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  6. 6.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  8. 8.Two angles together make a straight line. One of them is 50°. 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 180°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.A right angle is split into two angles. One of them is 50°. 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.An angle measures 115°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  14. 14.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 75° and 55°. What is the third angle (in degrees)?
  18. 18.An angle measures 25°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  19. 19.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  20. 20.Two angles of a triangle are 80° and 90°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 50° and 105°. What is the third angle (in degrees)?
  22. 22.Two angles of a triangle are 20° and 70°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 110° and 150°. What is the third angle (in degrees)?
  26. 26.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 85° and 65°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 35° and 35°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  31. 31.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  33. 33.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 140°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 180°. What is the third angle (in degrees)?
  37. 37.An angle measures 10°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  38. 38.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 60° and 115°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 120
  3. 120
  4. 10
  5. Obtuse
  6. 65
  7. Right
  8. 130
  9. 150
  10. Straight
  11. 40
  12. 20
  13. Obtuse
  14. 30
  15. 165
  16. 35
  17. 50
  18. Acute
  19. 50
  20. 10
  21. 25
  22. 90
  23. 180
  24. 15
  25. 100
  26. 35
  27. 30
  28. 110
  29. 110
  30. 190
  31. 25
  32. 55
  33. 115
  34. 150
  35. 5
  36. 130
  37. Acute
  38. 50
  39. 75
  40. 5

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