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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 518 · 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 155°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  3. 3.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  4. 4.Two angles of a triangle are 100° and 35°. What is the third angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  7. 7.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  8. 8.Two angles of a triangle are 50° and 30°. What is the third angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  10. 10.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 70° and 220°. What is the third angle (in degrees)?
  12. 12.An angle measures 180°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  13. 13.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  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 30°. What is the other angle (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  18. 18.Two angles of a triangle are 90° and 35°. What is the third angle (in degrees)?
  19. 19.An angle measures 50°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.Two angles of a triangle are 55° and 20°. What is the third angle (in degrees)?
  21. 21.Two angles of a triangle are 25° and 135°. What is the third angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  23. 23.An angle measures 165°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  24. 24.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  26. 26.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 130° and 100°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 90° and 50°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  31. 31.An angle measures 105°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  33. 33.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 40° and 60°. What is the third angle (in degrees)?
  38. 38.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  39. 39.Two angles of a triangle are 30° and 130°. What is the third angle (in degrees)?
  40. 40.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?

Answer key

  1. 25
  2. 120
  3. 120
  4. 45
  5. 30
  6. 75
  7. Right
  8. 100
  9. 65
  10. 35
  11. 70
  12. Straight
  13. 150
  14. 45
  15. 20
  16. 150
  17. 70
  18. 55
  19. Acute
  20. 105
  21. 20
  22. 105
  23. Obtuse
  24. 30
  25. 90
  26. 150
  27. 130
  28. 220
  29. 50
  30. 90
  31. Obtuse
  32. Acute
  33. 20
  34. 80
  35. 85
  36. 10
  37. 80
  38. 170
  39. 20
  40. 90

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