<div dir="ltr">I haven't see Mark's message yet, but I just saw Cecil's reply. Yes, I am aware of that (not the cornbread!). In fact, most scientific calculators have a "D-R-G" button that puts the calc into either degree mode, radian mode, or grad mode. A grad is 1/400 of a circle. I must admit I wasn't recognizing this as quite metric. But Mark is right - it would be a metric right triangle with 100 divisions. I have never encountered the actual use of grads anywhere outside an obscure trigonometry class once upon a time. So I still submit that in practice neither the circle nor time are metric.<div><br></div><div>SO</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 24, 2020 at 4:43 PM Cecil Bearden <<a href="mailto:crbearden@copper.net">crbearden@copper.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>Does this mean that we use cornbread for a factor instead of PI?
<br>
Cecil<br>
</p>
<div>On 2/24/2020 2:09 PM, Mark Johnson
wrote:<br>
</div>
<blockquote type="cite">
<div style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<div>There is an 'alternative' degree system where a full circle
is 400 degrees and a right angle is thus 100 degrees instead
of 90. I haven't played with the math implications, but it
seems logical that all triangles in such a system would have
angles adding up to 200 degrees.</div>
<div><br>
</div>
<div>The trig tables would look a bit strange at first but I
think all the identities will work regardless of the metric.</div>
<div><br>
</div>
<div>Mark J</div>
<div><br>
</div>
<hr id="gmail-m_5727819499200680372zwchr">
<div><b>From: </b>"Stephen Offiler"
<a href="mailto:soffiler@gmail.com" target="_blank"><soffiler@gmail.com></a><br>
<b>To: </b>"Antique Tractor Email Discussion Group"
<a href="mailto:at@lists.antique-tractor.com" target="_blank"><at@lists.antique-tractor.com></a><br>
<b>Sent: </b>Monday, February 24, 2020 8:32:41 AM<br>
<b>Subject: </b>Re: [AT] Supposedly why our old tractors are
not metric and a fairly simple tutorial<br>
</div>
<br>
<div>
<div dir="ltr">Metric time? Say 10 metric hours per day, 100
metric minutes per hour... why don't we do that?<br>
<div>Metric circles? Why not divide into 100, or 1000 parts
rather than 360?</div>
<br>
<div>SO</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Feb 24, 2020 at
9:09 AM Indiana Robinson <<a href="mailto:robinson46176@gmail.com" target="_blank">robinson46176@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">I'm not sure how accurate this story is but
it matches what I had read for years.
<div><a href="https://www.thevintagenews.com/2018/04/12/metric-system-usa/" target="_blank">https://www.thevintagenews.com/2018/04/12/metric-system-usa/</a></div>
<br>
<div>If they had listened to Jefferson we would not be
messing with a double system, metrics would just be
what we use... The 10 based system can be done in
your head (could have saved all those years learning
those damned fractions) :-) and every tool box
wouldn't have a fraction to decimal conversion chart
tucked in somewhere that you can't ever find when you
need it. Also we would not have to worry about some
dead kings thumb size getting lost or a bad few years
for the barley crop or a lot of other stuff they tried
to set as standards long ago.</div>
<br>
<div>This site looks fairly well done and I liked the
little section on the metric size of a few common
objects.</div>
<div><a href="https://www.wikihow.com/Measure-Centimeters?fbclid=IwAR1z77b9GTGRpTD7TM1cH51LA1CKzsTyPJ-n87HsRDmbJv7b5ME7QyCVpbs" target="_blank">https://www.wikihow.com/Measure-Centimeters?fbclid=IwAR1z77b9GTGRpTD7TM1cH51LA1CKzsTyPJ-n87HsRDmbJv7b5ME7QyCVpbs</a></div>
<br>
<div>If you have forgotten how to use your Abacus there
is a section on that too. :-)</div>
<br>
<br>
<div>.<br clear="all">
<br>
-- <br>
<div dir="ltr">
<div dir="ltr">
<div>-- <br>
<br>
Francis Robinson<br>
aka "farmer"<br>
Central Indiana USA<br>
<a href="mailto:robinson46176@gmail.com" target="_blank">robinson46176@gmail.com</a><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</div>
</div>
</div>
</div>
</div>
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