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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 496 · 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 together make a straight line. One of them is 170°. What is the other angle (in degrees)?
  2. 2.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  3. 3.Two angles together make a straight line. One of them is 120°. What is the other angle (in degrees)?
  4. 4.Two angles of a triangle are 40° and 75°. What is the third angle (in degrees)?
  5. 5.Two angles together make a straight line. One of them is 95°. What is the other angle (in degrees)?
  6. 6.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  7. 7.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 60°. What is the other angle (in degrees)?
  9. 9.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  10. 10.An angle measures 145°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  11. 11.An angle measures 125°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  12. 12.Three angles meet at a point. Two of them are 130° and 80°. What is the third angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 50° and 40°. What is the third angle (in degrees)?
  15. 15.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 7 o'clock (in degrees)?
  17. 17.Three angles meet at a point. Two of them are 130° and 140°. What is the third angle (in degrees)?
  18. 18.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  19. 19.An angle measures 75°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  20. 20.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  21. 21.Two angles together make a straight line. One of them is 100°. What is the other angle (in degrees)?
  22. 22.An angle measures 45°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  23. 23.An angle measures 120°. What kind of angle is it? (a) Obtuse (b) Acute (c) Right
  24. 24.Two angles of a triangle are 75° and 60°. What is the third angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 100° and 180°. What is the third angle (in degrees)?
  27. 27.Two angles of a triangle are 20° and 55°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 30° and 95°. What is the third angle (in degrees)?
  29. 29.An angle measures 95°. What kind of angle is it? (a) Straight (b) Right (c) Obtuse
  30. 30.A right angle is split into two angles. One of them is 85°. What is the other angle (in degrees)?
  31. 31.Two angles of a triangle are 30° and 45°. What is the third angle (in degrees)?
  32. 32.Three angles meet at a point. Two of them are 80° and 80°. What is the third angle (in degrees)?
  33. 33.Two angles of a triangle are 100° and 45°. What is the third angle (in degrees)?
  34. 34.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 65°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 50° and 50°. What is the third angle (in degrees)?
  37. 37.An angle measures 35°. What kind of angle is it? (a) Obtuse (b) Straight (c) Acute
  38. 38.Two angles together make a straight line. One of them is 40°. What is the other angle (in degrees)?
  39. 39.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  40. 40.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?

Answer key

  1. 10
  2. 60
  3. 60
  4. 65
  5. 85
  6. 160
  7. 120
  8. 30
  9. Straight
  10. Obtuse
  11. Obtuse
  12. 150
  13. 55
  14. 90
  15. 75
  16. 150
  17. 90
  18. 60
  19. Acute
  20. 25
  21. 80
  22. Acute
  23. Obtuse
  24. 45
  25. 160
  26. 80
  27. 105
  28. 55
  29. Obtuse
  30. 5
  31. 105
  32. 200
  33. 35
  34. 75
  35. 115
  36. 260
  37. Acute
  38. 140
  39. 35
  40. 25

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