The Oughtred Society Swap Sheet Online The swap sheet has been updated for October, and is now available for viewing. Go to : www.oughtred.org and on the left...
I have absolutely no connection with the author or publisher of the following, but thought some of our members might find it of interest. Divine Proportions:...
These are brand new and embroidered. Mens long sleeve denim shirt with embroidery above pocket "SPWSR" (still plays with slide rules), with a slide rule...
... And my only connection is that I had a brief email exchange with him about the book already. He seems like a nice guy, too. Actually, Cyril, maybe you...
Hi Dick, For the area of the triangle with sides 4, 5, 6 without trig, I would do this : Set up the triangle in the first quadrant, so the base is from (0,0)...
... (For the record: this formula is often called Heron's or Hero's formula after some ancient greek guy who seems to be the first in publishsing it some...
... So true. I have to refer to the sample chapter of Rational Trig to do it the new way, too. I probably should have looked for a more challenging example. ...
Good Morning all, Just wanted to say hello and introduce myself. I'm Shannon, living in Brisbane Australia and I've only just started admiring and collecting ...
Hello, I have a Jason No. 803 slide rule that was given to me many years ago. I need the two screws that hold the top stator in place. Anyone have any...
... or ... is ... Yes, it DOES providea clue. And I refer youto the works of Archimedes (to whom I owe the above construction). Archimedes explains why the ...
The argument in the earlier posting below is well known but depends on a proof that the circumference is 2*pi*r, and that isn't so obvious, is it? Now a...
... That was a definition of pi: pi is a ratio of circumference to diameter. Or maybe I misunderstood your statement and you are looking for a proof that...
I can't understand why, from my statement, that I would be "looking for a proof that diameter is equal to 2*radius"??? The definition "pi is a ratio of...
Divine Proportions: Rational Trigonometry to Universal Geometry by Dr. Norman Wildberger http://en.wikipedia.org/wiki/Rational_trigonometry Rational...
... we will ... The definition of pi: pi=circumference/diameter So circumpherence=pi*diameter=pi*2*r=2*pi*r Here I substituded diameter for 2*r and rearranged...
The good Andrew must have misunderstood me (a couple of times). If one reads me carefully, I'm not asking for a DEFINITION of pi - everybody knows what that...
From my brief web search (http://www.math.com/tables/constants/pi.htm and a couple of others), I think you may be misunderstanding. PI is a constant ratio, not...
........................yes Brian that's what Pi is--a ratio. Can examine that definition in almost all handbooks of math.----tomass ... From: "Brian Stacy"...
Tom Grosh
tgrosch@...
Oct 8, 2005 1:57 am
28260
Not quite ... You can look for a proof that the circumference to diameter ratio holds true for all sizes of circles. But you can't prove PI. It is just the...
Or do you mean that it doesn't seem right to define PI(E) as a ration? :-) Dave S ... From: Brian Stacy To: sliderule@yahoogroups.com Sent: Saturday, October...
Pi is a defined ratio- defined, not proven. How about knocking off the word war? The rest of us aren't interested. Please take the cat fight off forum, and...
Hello Shannon, There are many ways that people display slide rules, so it is hard to say one way or another. But, a few general thoughts might be : Keep out of...
I think Brian's point is that pi is an irrational number, which means "a number that can't be expressed (exactly) as a ratio." In the real world, the ratio of...
Hello Wayne, An irrational number is one that cannot be expressed as a fraction a/b for any *integers* a and b. A ratio can still give an irrational number. ...
I don't know where you got the definition of irrational number, but one that I've found (http://mathworld.wolfram.com/IrrationalNumber.html) is not quite the...
... A rational number is a ratio of two integers. In a/b, if a or b is irrational, the ratio is irrational. E. g., pi/3 is a ratio, but irrational. ...
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