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. Deloy
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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Come on. Don't you own a protractor and pencil anymore? Jeez. 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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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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11.31 degrees (the arctangent of 0.2) Fletch Sent from my iPad On Aug 29, 2012, at 6:54 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
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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Thanks, professor! My mom passed-on on Monday and I'm not feeling too charitable right now, or even sober enough to care. I appreciate your reply, Fletcher. I knew you'd know the shortcut. C. On Wed, Aug 29, 2012 at 7:03 PM, Fletcher Gross <gross@math.utah.edu> wrote:
11.31 degrees (the arctangent of 0.2)
Fletch
Sent from my iPad
On Aug 29, 2012, at 6:54 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
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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I'm sorry to hear about your mother. Mathematics isn't very important compared to something like that. Fletch Sent from my iPad On Aug 29, 2012, at 7:26 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
Thanks, professor!
My mom passed-on on Monday and I'm not feeling too charitable right now, or even sober enough to care. I appreciate your reply, Fletcher. I knew you'd know the shortcut.
C.
On Wed, Aug 29, 2012 at 7:03 PM, Fletcher Gross <gross@math.utah.edu> wrote:
11.31 degrees (the arctangent of 0.2)
Fletch
Sent from my iPad
On Aug 29, 2012, at 6:54 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
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.
Deloy _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Sorry to hear about your Mom Chuck. That sucks. Wish I could offer something more profound, but I can't sum it up any better. (BTW...as a product of the Utah Public School System, I had to look up grades vs angles. But I'm pretty sure 20% of 90 isn't 11.31) Dan On Aug 29, 2012, at 7:26 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
Thanks, professor!
My mom passed-on on Monday and I'm not feeling too charitable right now, or even sober enough to care. I appreciate your reply, Fletcher. I knew you'd know the shortcut.
C.
On Wed, Aug 29, 2012 at 7:03 PM, Fletcher Gross <gross@math.utah.edu> wrote:
11.31 degrees (the arctangent of 0.2)
Fletch
Sent from my iPad
On Aug 29, 2012, at 6:54 PM, Chuck Hards <chuck.hards@gmail.com> wrote:
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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-- Daniel Holmes, danielh@holmesonics.com "Laugh while you can, monkey boy!" -- Lord John Whorfin
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.
Deloy _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Chuck, I'm so sorry to hear about your Mom. A friend who lost his mother some years ago told me, "It doesn't matter how old or adult you are - she's always your Mommy." A few years later my Mom passed away and I understood what he was trying to say. My mother died on February 2, 2003. The rest of the country was mourning the loss of a few astronauts, but I had lost someone of infinitely greater worth. (And I'm not disparaging astronauts - I think you'll all understand.) I hope, Chuck that you'll find comfort in priceless memories and the company of your loved ones still with you. Kim
Chuck, My condolences for the loss of one of the most important people in the world. Take time to remember - but then you always will. Brent
Sorry to hear about your mom, Chuck. My thoughts and prayers are with you during this tough time. Mat This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation
Funny this would come up now. I've been helping my son with his homework and it just happened to be about graphing linear equations. Remember, slope is expressed as the ratio of rise over run. Of course a ratio can also be expressed as a percentage, so a 100 percent slope has a rise equal to its run, or a ratio of 1:1. That yields a 45 degree angle, not a 90 degree angle, just as Deloy reminded us. A 20 percent slope gives an angle of 11.31 degrees. Chuck can be forgiven. He has more important things on his mind. I'm just bored and found a moment to respond. Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of M Wilson Sent: Wednesday, August 29, 2012 9:44 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] 20% Grade? 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.
Deloy
participants (9)
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Brent Watson -
Chrismo -
Chuck Hards -
D P Pierce -
Daniel Holmes -
Fletcher Gross -
Hutchings, Mat -
Kim Hyatt -
M Wilson