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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 554 · 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 60° and 80°. What is the third angle (in degrees)?
  2. 2.Two angles of a triangle are 55° and 105°. What is the third angle (in degrees)?
  3. 3.An angle measures 45°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  4. 4.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 150° and 140°. What is the third angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 75°. What is the other angle (in degrees)?
  9. 9.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Acute
  10. 10.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  11. 11.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 20° and 50°. What is the third angle (in degrees)?
  14. 14.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  15. 15.An angle measures 130°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  16. 16.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 60°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 100° and 120°. What is the third angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 70° and 100°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 50° and 190°. What is the third angle (in degrees)?
  23. 23.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  24. 24.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  25. 25.An angle measures 175°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  26. 26.Three angles meet at a point. Two of them are 60° and 140°. What is the third angle (in degrees)?
  27. 27.An angle measures 120°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  28. 28.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  29. 29.A right angle is split into two angles. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 60° and 240°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 60° and 90°. What is the third angle (in degrees)?
  33. 33.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  35. 35.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  36. 36.An angle measures 80°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  37. 37.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  39. 39.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  40. 40.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?

Answer key

  1. 220
  2. 20
  3. Acute
  4. 30
  5. 30
  6. 25
  7. 70
  8. 15
  9. Right
  10. 15
  11. 5
  12. 50
  13. 110
  14. 70
  15. Obtuse
  16. 35
  17. 30
  18. 220
  19. 55
  20. 140
  21. 190
  22. 120
  23. 60
  24. 120
  25. Obtuse
  26. 160
  27. Obtuse
  28. 60
  29. 10
  30. 130
  31. 60
  32. 30
  33. 140
  34. 15
  35. Straight
  36. Acute
  37. 20
  38. 150
  39. 80
  40. 25

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