Wrong, go to http://en.wikipedia.org/wiki/File:Grades_degrees.svg as suggested by Chrismo ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Wednesday, August 29, 2012 6:54 PM Subject: Re: [Utah-astronomy] 20% Grade? You dont even need a protractor. Just calculate 20% of 90. Go to public grade school in Utah, did you? On Aug 29, 2012 3:30 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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