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Supplementary angles

Year 8 maths · Fieldbook Learning

Name ______________________ Date __________

Supplementary angles add up to 180 degrees.

  1. Two angles are supplementary. One angle is 11°. How many degrees is the other angle?
  2. Two angles are supplementary. One angle is 75°. How many degrees is the other angle?
  3. Two angles are supplementary. One angle is 110°. How many degrees is the other angle?
  4. Two angles are supplementary. One angle is 161°. How many degrees is the other angle?
  5. Two angles are supplementary. One angle is 124°. How many degrees is the other angle?
  6. Two angles are supplementary. One angle is 121°. How many degrees is the other angle?
  7. Two angles are supplementary. One angle is 33°. How many degrees is the other angle?
  8. Two angles are supplementary. One angle is 155°. How many degrees is the other angle?
  9. Two angles are supplementary. One angle is 132°. How many degrees is the other angle?
  10. Two angles are supplementary. One angle is 53°. How many degrees is the other angle?
  11. Two angles are supplementary. One angle is 76°. How many degrees is the other angle?
  12. Two angles are supplementary. One angle is 49°. How many degrees is the other angle?
  13. Two angles are supplementary. One angle is 149.5°. How many degrees is the other angle?
  14. Two angles are supplementary. One angle is 168.5°. How many degrees is the other angle?
  15. Two angles are supplementary. One angle is 98.5°. How many degrees is the other angle?
  16. Two angles are supplementary. One angle is 162.5°. How many degrees is the other angle?
  17. Two angles are supplementary. One angle is 61.5°. How many degrees is the other angle?
  18. Two angles are supplementary. One angle is 165.5°. How many degrees is the other angle?
  19. Two angles are supplementary. One angle is 81.5°. How many degrees is the other angle?
  20. Two angles are supplementary. One angle is 89.5°. How many degrees is the other angle?
More free practice: fieldbooklearning.com/uk/practice/year-8/supplementary-angles/

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Answer key: Supplementary angles

  1. 169
  2. 105
  3. 70
  4. 19
  5. 56
  6. 59
  7. 147
  8. 25
  9. 48
  10. 127
  11. 104
  12. 131
  13. 30.5
  14. 11.5
  15. 81.5
  16. 17.5
  17. 118.5
  18. 14.5
  19. 98.5
  20. 90.5