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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 679 · 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.An angle measures 110°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  2. 2.An angle measures 180°. What kind of angle is it? (a) Obtuse (b) Right (c) Straight
  3. 3.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  4. 4.An angle measures 175°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  5. 5.Two angles of a triangle are 100° and 50°. What is the third angle (in degrees)?
  6. 6.A right angle is split into two angles. One of them is 25°. What is the other angle (in degrees)?
  7. 7.Two angles of a triangle are 70° and 95°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 35°. What is the other angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  11. 11.An angle measures 90°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  12. 12.An angle measures 40°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  13. 13.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  14. 14.Three angles meet at a point. Two of them are 140° and 70°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 30°. What is the other angle (in degrees)?
  16. 16.Two angles of a triangle are 35° and 55°. What is the third angle (in degrees)?
  17. 17.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  18. 18.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  20. 20.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  22. 22.Two angles of a triangle are 85° and 50°. What is the third angle (in degrees)?
  23. 23.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 110° and 140°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 140°. What is the third angle (in degrees)?
  26. 26.Two angles of a triangle are 50° and 55°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  28. 28.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  30. 30.Two angles of a triangle are 20° and 30°. What is the third angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  32. 32.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  33. 33.Two angles together make a straight line. One of them is 10°. What is the other angle (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 150°. What is the third angle (in degrees)?
  35. 35.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  36. 36.An angle measures 165°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  37. 37.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 90° and 40°. What is the third angle (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 100° and 110°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 20° and 80°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. Straight
  3. 180
  4. Obtuse
  5. 30
  6. 65
  7. 15
  8. 55
  9. 145
  10. 120
  11. Right
  12. Acute
  13. 60
  14. 150
  15. 150
  16. 90
  17. 55
  18. 120
  19. 15
  20. 80
  21. 135
  22. 45
  23. 80
  24. 110
  25. 140
  26. 75
  27. 155
  28. 35
  29. 100
  30. 130
  31. 90
  32. Acute
  33. 170
  34. 70
  35. 20
  36. Obtuse
  37. 70
  38. 50
  39. 150
  40. 80

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