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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 143 · 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 70° and 50°. What is the third angle (in degrees)?
  2. 2.Three angles meet at a point. Two of them are 70° and 60°. What is the third angle (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  4. 4.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  7. 7.An angle measures 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  8. 8.Three angles meet at a point. Two of them are 90° and 160°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 90° and 110°. What is the third angle (in degrees)?
  10. 10.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  12. 12.Three angles meet at a point. Two of them are 120° and 180°. What is the third angle (in degrees)?
  13. 13.An angle measures 40°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  14. 14.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 115°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  17. 17.An angle measures 90°. What kind of angle is it? (a) Acute (b) Straight (c) Right
  18. 18.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  20. 20.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  21. 21.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  22. 22.Two angles together make a straight line. One of them is 50°. What is the other angle (in degrees)?
  23. 23.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  24. 24.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  25. 25.An angle measures 175°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  26. 26.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 75° and 40°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 85° and 90°. What is the third angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 70° and 120°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  32. 32.What is the smaller angle between the hands of a clock at 1 o'clock (in degrees)?
  33. 33.A right angle is split into two angles. One of them is 15°. What is the other angle (in degrees)?
  34. 34.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  35. 35.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  36. 36.An angle measures 140°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  37. 37.Two angles of a triangle are 100° and 75°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 75° and 50°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 60°. What is the third angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 140°. What is the other angle (in degrees)?

Answer key

  1. 60
  2. 230
  3. 160
  4. 100
  5. 30
  6. 60
  7. Straight
  8. 110
  9. 160
  10. 150
  11. 230
  12. 60
  13. Acute
  14. 45
  15. 65
  16. 60
  17. Right
  18. 95
  19. 80
  20. 180
  21. Acute
  22. 130
  23. 85
  24. Obtuse
  25. Obtuse
  26. 110
  27. 65
  28. 60
  29. 5
  30. 170
  31. 150
  32. 30
  33. 75
  34. 55
  35. 60
  36. Obtuse
  37. 5
  38. 55
  39. 200
  40. 40

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