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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 246 · 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.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?
  2. 2.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  4. 4.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  5. 5.Two angles of a triangle are 75° and 20°. What is the third angle (in degrees)?
  6. 6.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 60° and 130°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?
  9. 9.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  10. 10.An angle measures 25°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Straight (c) Right
  13. 13.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 110° and 70°. What is the third angle (in degrees)?
  15. 15.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  16. 16.Three angles meet at a point. Two of them are 100° and 90°. What is the third angle (in degrees)?
  17. 17.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 40° and 130°. What is the third angle (in degrees)?
  19. 19.An angle measures 180°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  20. 20.Two angles of a triangle are 90° and 75°. What is the third angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  23. 23.An angle measures 50°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  24. 24.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  26. 26.Two angles of a triangle are 45° and 105°. What is the third angle (in degrees)?
  27. 27.Three angles meet at a point. Two of them are 150° and 100°. What is the third angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  29. 29.Two angles of a triangle are 40° and 135°. What is the third angle (in degrees)?
  30. 30.Two angles of a triangle are 50° and 70°. What is the third angle (in degrees)?
  31. 31.Two angles together make a straight line. One of them is 80°. 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 together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 15°. What is the other angle (in degrees)?
  36. 36.Two angles of a triangle are 85° and 30°. What is the third angle (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 140° 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.Two angles together make a straight line. One of them is 110°. What is the other angle (in degrees)?
  40. 40.Two angles of a triangle are 65° and 25°. What is the third angle (in degrees)?

Answer key

  1. 170
  2. Obtuse
  3. 30
  4. 85
  5. 85
  6. 190
  7. 170
  8. 40
  9. 20
  10. Acute
  11. 5
  12. Right
  13. 60
  14. 180
  15. 30
  16. 170
  17. 150
  18. 10
  19. Straight
  20. 15
  21. 170
  22. 80
  23. Acute
  24. 180
  25. 120
  26. 30
  27. 110
  28. 60
  29. 5
  30. 60
  31. 100
  32. 55
  33. 80
  34. 25
  35. 165
  36. 65
  37. 130
  38. 150
  39. 70
  40. 90

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