I understand that the slope of a roof is measured by the amount of inches it rises by the run measurement. So for every 4" rise for every 12" run would be 4:12.

The pitch is: A roof that rises 8 feet over a 24-foot span was said to have a “1 to 3” pitch. If the rise is 4 feet over a 24-foot span, then the roof pitch was said to be “1 to 6.”

I dont understand how they are getting 1/3" pitch or 1/6" pitch? Why is a pitch described in feet and the slope is described in inches?

TYIA Candi