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Class 5 Maths Worksheet: Angles

Maths worksheets lesson 39: Angles · Set 216 · 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 90°. What kind of angle is it? (a) Right (b) Obtuse (c) Straight
  2. 2.Two angles together make a straight line. One of them is 125°. What is the other angle (in degrees)?
  3. 3.An angle measures 15°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  4. 4.Two angles together make a straight line. One of them is 80°. What is the other angle (in degrees)?
  5. 5.What is the smaller angle between the hands of a clock at 3 o'clock (in degrees)?
  6. 6.An angle measures 180°. What kind of angle is it? (a) Right (b) Straight (c) Obtuse
  7. 7.A right angle is split into two angles. One of them is 20°. What is the other angle (in degrees)?
  8. 8.A right angle is split into two angles. One of them is 65°. What is the other angle (in degrees)?
  9. 9.An angle measures 30°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  10. 10.What is the smaller angle between the hands of a clock at 5 o'clock (in degrees)?
  11. 11.Two angles together make a straight line. One of them is 70°. What is the other angle (in degrees)?
  12. 12.Two angles together make a straight line. One of them is 105°. What is the other angle (in degrees)?
  13. 13.Two angles of a triangle are 25° and 60°. What is the third angle (in degrees)?
  14. 14.What is the smaller angle between the hands of a clock at 10 o'clock (in degrees)?
  15. 15.An angle measures 20°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  16. 16.Two angles together make a straight line. One of them is 85°. What is the other angle (in degrees)?
  17. 17.Two angles of a triangle are 50° and 25°. What is the third angle (in degrees)?
  18. 18.A right angle is split into two angles. One of them is 40°. What is the other angle (in degrees)?
  19. 19.An angle measures 85°. What kind of angle is it? (a) Right (b) Obtuse (c) Acute
  20. 20.A right angle is split into two angles. One of them is 5°. What is the other angle (in degrees)?
  21. 21.An angle measures 40°. What kind of angle is it? (a) Acute (b) Obtuse (c) Right
  22. 22.Two angles together make a straight line. One of them is 75°. What is the other angle (in degrees)?
  23. 23.What is the smaller angle between the hands of a clock at 6 o'clock (in degrees)?
  24. 24.Two angles together make a straight line. One of them is 60°. What is the other angle (in degrees)?
  25. 25.Three angles meet at a point. Two of them are 80° and 50°. What is the third angle (in degrees)?
  26. 26.Three angles meet at a point. Two of them are 130° and 160°. What is the third angle (in degrees)?
  27. 27.Two angles together make a straight line. One of them is 130°. What is the other angle (in degrees)?
  28. 28.Three angles meet at a point. Two of them are 80° and 100°. What is the third angle (in degrees)?
  29. 29.Two angles together make a straight line. One of them is 145°. What is the other angle (in degrees)?
  30. 30.Three angles meet at a point. Two of them are 110° and 180°. What is the third angle (in degrees)?
  31. 31.An angle measures 150°. What kind of angle is it? (a) Acute (b) Straight (c) Obtuse
  32. 32.An angle measures 80°. What kind of angle is it? (a) Obtuse (b) Right (c) Acute
  33. 33.A right angle is split into two angles. One of them is 55°. What is the other angle (in degrees)?
  34. 34.A right angle is split into two angles. One of them is 10°. What is the other angle (in degrees)?
  35. 35.Two angles together make a straight line. One of them is 25°. What is the other angle (in degrees)?
  36. 36.Three angles meet at a point. Two of them are 70° and 170°. What is the third angle (in degrees)?
  37. 37.Two angles of a triangle are 85° and 25°. What is the third angle (in degrees)?
  38. 38.Two angles of a triangle are 65° and 105°. What is the third angle (in degrees)?
  39. 39.Two angles of a triangle are 70° and 35°. What is the third angle (in degrees)?
  40. 40.Two angles of a triangle are 25° and 145°. What is the third angle (in degrees)?

Answer key

  1. Right
  2. 55
  3. Acute
  4. 100
  5. 90
  6. Straight
  7. 70
  8. 25
  9. Acute
  10. 150
  11. 110
  12. 75
  13. 95
  14. 60
  15. Acute
  16. 95
  17. 105
  18. 50
  19. Acute
  20. 85
  21. Acute
  22. 105
  23. 180
  24. 120
  25. 230
  26. 70
  27. 50
  28. 180
  29. 35
  30. 70
  31. Obtuse
  32. Acute
  33. 35
  34. 80
  35. 155
  36. 120
  37. 70
  38. 10
  39. 75
  40. 10

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