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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 699 · 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 155°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  2. 2.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  3. 3.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  4. 4.Two angles of a triangle are 25° and 35°. What is the third angle (in degrees)?
  5. 5.Three angles meet at a point. Two of them are 70° and 190°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 80° and 35°. What is the third angle (in degrees)?
  7. 7.Three angles meet at a point. Two of them are 140° and 50°. What is the third angle (in degrees)?
  8. 8.Two angles of a triangle are 35° and 25°. What is the third angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 140° and 110°. What is the third angle (in degrees)?
  10. 10.Two angles of a triangle are 45° and 25°. What is the third angle (in degrees)?
  11. 11.An angle measures 180°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  12. 12.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  14. 14.An angle measures 20°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  15. 15.Two angles of a triangle are 45° and 20°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  17. 17.An angle measures 80°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  18. 18.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  19. 19.An angle measures 75°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  20. 20.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  21. 21.An angle measures 55°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  22. 22.An angle measures 100°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  23. 23.Two angles of a triangle are 40° and 20°. What is the third angle (in degrees)?
  24. 24.Three angles meet at a point. Two of them are 100° and 200°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 20° and 60°. What is the third angle (in degrees)?
  26. 26.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  27. 27.Two angles of a triangle are 80° and 70°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 55° and 95°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 45°. What is the other angle (in degrees)?
  31. 31.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  32. 32.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  34. 34.Three angles meet at a point. Two of them are 140° and 80°. What is the third angle (in degrees)?
  35. 35.An angle measures 45°. What kind of angle is it? (a) Straight (b) Right (c) Acute
  36. 36.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  37. 37.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  38. 38.Three angles meet at a point. Two of them are 120° and 160°. What is the third angle (in degrees)?
  39. 39.An angle measures 165°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  40. 40.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?

Answer key

  1. Obtuse
  2. 15
  3. 30
  4. 120
  5. 100
  6. 65
  7. 170
  8. 120
  9. 110
  10. 110
  11. Straight
  12. 80
  13. 160
  14. Acute
  15. 115
  16. 90
  17. Acute
  18. 15
  19. Acute
  20. 100
  21. Acute
  22. Obtuse
  23. 120
  24. 60
  25. 100
  26. 55
  27. 30
  28. 30
  29. 75
  30. 135
  31. 180
  32. 40
  33. 150
  34. 140
  35. Acute
  36. 60
  37. 240
  38. 80
  39. Obtuse
  40. 10

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