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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 482 · 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 45°. What is the other angle (in degrees)?
  2. 2.Two angles of a triangle are 20° and 45°. What is the third angle (in degrees)?
  3. 3.An angle measures 180°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  4. 4.An angle measures 90°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  5. 5.Two angles of a triangle are 90° and 30°. What is the third angle (in degrees)?
  6. 6.Two angles of a triangle are 70° and 100°. What is the third angle (in degrees)?
  7. 7.An angle measures 95°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  8. 8.Two angles together make a straight line. One of them is 155°. What is the other angle (in degrees)?
  9. 9.Three angles meet at a point. Two of them are 50° and 200°. What is the third angle (in degrees)?
  10. 10.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  11. 11.Three angles meet at a point. Two of them are 120° and 90°. What is the third angle (in degrees)?
  12. 12.A right angle is split into two angles. One of them is 35°. What is the other angle (in degrees)?
  13. 13.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  14. 14.Two angles of a triangle are 70° and 85°. What is the third angle (in degrees)?
  15. 15.Three angles meet at a point. Two of them are 100° and 70°. What is the third angle (in degrees)?
  16. 16.What is the smaller angle between the hands of a clock at 11 o'clock (in degrees)?
  17. 17.An angle measures 80°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  18. 18.Two angles together make a straight line. One of them is 20°. What is the other angle (in degrees)?
  19. 19.A right angle is split into two angles. One of them is 45°. What is the other angle (in degrees)?
  20. 20.What is the smaller angle between the hands of a clock at 8 o'clock (in degrees)?
  21. 21.An angle measures 110°. What kind of angle is it? (a) Straight (b) Acute (c) Obtuse
  22. 22.Two angles together make a straight line. One of them is 160°. What is the other angle (in degrees)?
  23. 23.Two angles of a triangle are 95° and 70°. What is the third angle (in degrees)?
  24. 24.Two angles of a triangle are 75° and 35°. What is the third angle (in degrees)?
  25. 25.What is the smaller angle between the hands of a clock at 4 o'clock (in degrees)?
  26. 26.An angle measures 35°. What kind of angle is it? (a) Straight (b) Acute (c) Right
  27. 27.Three angles meet at a point. Two of them are 130° and 70°. What is the third angle (in degrees)?
  28. 28.Two angles of a triangle are 80° and 30°. What is the third angle (in degrees)?
  29. 29.Two angles of a triangle are 35° and 50°. What is the third angle (in degrees)?
  30. 30.What is the smaller angle between the hands of a clock at 2 o'clock (in degrees)?
  31. 31.An angle measures 20°. What kind of angle is it? (a) Acute (b) Right (c) Obtuse
  32. 32.An angle measures 30°. What kind of angle is it? (a) Acute (b) Obtuse (c) Straight
  33. 33.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  34. 34.An angle measures 160°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  35. 35.A right angle is split into two angles. One of them is 50°. What is the other angle (in degrees)?
  36. 36.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  37. 37.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  38. 38.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  39. 39.Three angles meet at a point. Two of them are 150° and 70°. What is the third angle (in degrees)?
  40. 40.An angle measures 75°. What kind of angle is it? (a) Obtuse (b) Acute (c) Straight

Answer key

  1. 135
  2. 115
  3. Straight
  4. Right
  5. 60
  6. 10
  7. Obtuse
  8. 25
  9. 110
  10. 180
  11. 150
  12. 55
  13. 120
  14. 25
  15. 190
  16. 30
  17. Acute
  18. 160
  19. 45
  20. 120
  21. Obtuse
  22. 20
  23. 15
  24. 70
  25. 120
  26. Acute
  27. 160
  28. 70
  29. 95
  30. 60
  31. Acute
  32. Acute
  33. 105
  34. Obtuse
  35. 40
  36. 110
  37. 35
  38. 150
  39. 140
  40. Acute

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