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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 785 · 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 of a triangle are 45° and 60°. What is the third angle (in degrees)?
  2. 2.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  3. 3.An angle measures 125°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  4. 4.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  6. 6.Two angles of a triangle are 60° and 45°. What is the third angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  8. 8.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?
  9. 9.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 60° and 30°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 100° and 40°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 55° and 120°. What is the third angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 100° and 100°. What is the third angle (in degrees)?
  21. 21.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  22. 22.Two angles of a triangle are 50° and 20°. What is the third angle (in degrees)?
  23. 23.An angle measures 115°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  24. 24.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  25. 25.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  26. 26.An angle measures 100°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  27. 27.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 140° and 90°. What is the third angle (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 110° and 120°. What is the third angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 25° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 90° and 85°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 35° and 45°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 65° and 90°. What is the third angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  40. 40.Two angles of a triangle are 30° and 105°. What is the third angle (in degrees)?

Answer key

  1. 75
  2. 150
  3. Obtuse
  4. 230
  5. 35
  6. 75
  7. Right
  8. 110
  9. 90
  10. 90
  11. 15
  12. 95
  13. 40
  14. 10
  15. 90
  16. 150
  17. 5
  18. 180
  19. 70
  20. 160
  21. 60
  22. 110
  23. Obtuse
  24. 65
  25. Straight
  26. Obtuse
  27. 260
  28. 130
  29. 130
  30. 155
  31. 65
  32. 5
  33. 40
  34. 100
  35. 110
  36. 120
  37. 25
  38. 150
  39. 60
  40. 45

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