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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 211 · 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.Two angles of a triangle are 55° and 100°. What is the third angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  8. 8.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Right
  9. 9.Two angles of a triangle are 55° and 40°. What is the third angle (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 75°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  13. 13.Two angles of a triangle are 90° and 55°. What is the third angle (in degrees)?
  14. 14.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  15. 15.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  16. 16.Two angles of a triangle are 35° and 60°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  18. 18.An angle measures 180°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  19. 19.Three angles meet at a point. Two of them are 90° and 140°. What is the third angle (in degrees)?
  20. 20.Two angles of a triangle are 40° and 25°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  22. 22.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  23. 23.Three angles meet at a point. Two of them are 60° and 100°. What is the third angle (in degrees)?
  24. 24.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  25. 25.An angle measures 155°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  26. 26.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  29. 29.Three angles meet at a point. Two of them are 50° and 120°. What is the third angle (in degrees)?
  30. 30.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  31. 31.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  32. 32.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 120° and 70°. What is the third angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 70° and 150°. What is the third angle (in degrees)?
  35. 35.Three angles meet at a point. Two of them are 120° and 130°. What is the third angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 60° and 55°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 35° and 70°. What is the third angle (in degrees)?
  39. 39.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  40. 40.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?

Answer key

  1. 70
  2. 25
  3. 120
  4. 65
  5. 155
  6. 60
  7. 10
  8. Obtuse
  9. 85
  10. 130
  11. Acute
  12. 105
  13. 35
  14. 95
  15. 120
  16. 85
  17. 25
  18. Straight
  19. 130
  20. 115
  21. 15
  22. 90
  23. 200
  24. 45
  25. Obtuse
  26. 20
  27. 55
  28. 30
  29. 190
  30. 30
  31. Right
  32. 110
  33. 170
  34. 140
  35. 110
  36. 190
  37. 65
  38. 75
  39. Acute
  40. 85

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