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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 909 · 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 100° and 190°. What is the third angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  4. 4.An angle measures 175°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  5. 5.An angle measures 90°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  6. 6.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  9. 9.An angle measures 125°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  10. 10.An angle measures 170°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  11. 11.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 145°. What is the other 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.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  16. 16.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  18. 18.Three angles meet at a point. Two of them are 80° and 170°. What is the third angle (in degrees)?
  19. 19.Two angles of a triangle are 75° and 85°. What is the third angle (in degrees)?
  20. 20.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  21. 21.Three angles meet at a point. Two of them are 90° and 150°. What is the third angle (in degrees)?
  22. 22.Three angles meet at a point. Two of them are 130° and 50°. What is the third angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  25. 25.A right angle is split into two angles. One of them is 30°. What is the other angle (in degrees)?
  26. 26.An angle measures 95°. What kind of angle is it? (a) Straight (b) Obtuse (c) Acute
  27. 27.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  28. 28.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  29. 29.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  30. 30.An angle measures 155°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  31. 31.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 120° and 150°. What is the third angle (in degrees)?
  33. 33.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 60° and 200°. What is the third angle (in degrees)?
  35. 35.Two angles of a triangle are 100° and 25°. What is the third angle (in degrees)?
  36. 36.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  37. 37.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 9 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 65° and 60°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 70° and 180°. What is the third angle (in degrees)?

Answer key

  1. 70
  2. 90
  3. Straight
  4. Obtuse
  5. Right
  6. 15
  7. 65
  8. 115
  9. Obtuse
  10. Obtuse
  11. 15
  12. 65
  13. 35
  14. 95
  15. 100
  16. 145
  17. 40
  18. 110
  19. 20
  20. 120
  21. 120
  22. 180
  23. 180
  24. 140
  25. 60
  26. Obtuse
  27. 55
  28. 60
  29. 70
  30. Obtuse
  31. 180
  32. 90
  33. 160
  34. 100
  35. 55
  36. 50
  37. 20
  38. 90
  39. 55
  40. 110

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