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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 549 · 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 180°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  2. 2.Two angles of a triangle are 70° and 90°. What is the third angle (in degrees)?
  3. 3.Two angles of a triangle are 40° and 45°. What is the third angle (in degrees)?
  4. 4.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  5. 5.A right angle is split into two angles. One of them is 70°. What is the other angle (in degrees)?
  6. 6.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  7. 7.Two angles of a triangle are 40° and 85°. What is the third angle (in degrees)?
  8. 8.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  9. 9.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  10. 10.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight
  11. 11.Three angles meet at a point. Two of them are 150° and 130°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  13. 13.Three angles meet at a point. Two of them are 100° and 160°. What is the third angle (in degrees)?
  14. 14.An angle measures 90°. What kind of angle is it? (a) Right (b) Acute (c) Straight
  15. 15.An angle measures 60°. What kind of angle is it? (a) Right (b) Acute (c) Obtuse
  16. 16.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  17. 17.Two angles of a triangle are 85° and 40°. What is the third angle (in degrees)?
  18. 18.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  19. 19.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  22. 22.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  23. 23.An angle measures 135°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  24. 24.Three angles meet at a point. Two of them are 120° and 50°. What is the third angle (in degrees)?
  25. 25.Two angles of a triangle are 30° and 60°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 60° and 60°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 30° and 20°. What is the third angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 160°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 90°. What is the other angle (in degrees)?
  30. 30.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  31. 31.Three angles meet at a point. Two of them are 80° and 90°. What is the third angle (in degrees)?
  32. 32.Two angles of a triangle are 65° and 100°. What is the third angle (in degrees)?
  33. 33.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  34. 34.Two angles together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 165°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 80°. What is the third angle (in degrees)?
  37. 37.An angle measures 160°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  38. 38.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  39. 39.Two angles of a triangle are 80° and 50°. What is the third angle (in degrees)?
  40. 40.Three angles meet at a point. Two of them are 50° and 140°. What is the third angle (in degrees)?

Answer key

  1. Straight
  2. 20
  3. 95
  4. 90
  5. 20
  6. 120
  7. 55
  8. 60
  9. 155
  10. Acute
  11. 80
  12. 85
  13. 100
  14. Right
  15. Acute
  16. 90
  17. 55
  18. 120
  19. 95
  20. 150
  21. 160
  22. 115
  23. Obtuse
  24. 190
  25. 90
  26. 240
  27. 130
  28. 120
  29. 90
  30. 85
  31. 190
  32. 15
  33. 150
  34. 10
  35. 15
  36. 210
  37. Obtuse
  38. 60
  39. 50
  40. 170

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