http://en.wikipedia.org/wiki/File:Grades_degrees.svg On Wed, Aug 29, 2012 at 3:29 PM, D P Pierce <starsbirdsglyphs@gmail.com>wrote:
Seth, About what degree angle would 20% be? I think I remember a 20% grade means that in a 100 feet of horizontal travel the grade increases or decreases 20 feet. That would mean a 100% grade would be a 45 degree angle. I think a 20% grade would be a lot less than a 20 degree angle. I've forgotten all of my trigonometry or I could calculate it myself.
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