[Blindmath] A Student's Question

Sat Nov 12 19:28:19 UTC 2016

For some reason, I think Sabra would like this: https://webcache.googleusercontent.com/search?q=cache:Eb7_N5t3ZHcJ:https://www.agecon.purdue.edu/crd/localgov/second%2520level%2520pages/indiana_pi_story.htm+&cd=10&hl=en&ct=clnk&gl=us <https://webcache.googleusercontent.com/search?q=cache:Eb7_N5t3ZHcJ:https://www.agecon.purdue.edu/crd/localgov/second%20level%20pages/indiana_pi_story.htm+&cd=10&hl=en&ct=clnk&gl=us&client=safari>

Bill
> On Nov 12, 2016, at 6:40 AM, Dzhovani via Blindmath <blindmath at nfbnet.org> wrote:
> 
> It comes from 22 divided by 7 as a useful approximation.
> On 12.11.2016 г. 05:11 ч., Steve Jacobson via Blindmath wrote:
>> All,
>> 
>> I suspect that the confusion is coming from the fact that particularly
>> before calculators were common many people use 3-1/7 or 22/7 as the value
>> for pi.  Using 22/7 is particularly more convenient when doing calculations
>> on paper or in one's head but is less accurate.  The decimal value of 3-1/7
>> is a repeating decimal of 3.142857142857 and so on and could be rounded as
>> 3.14286.  I suspect this is the number referred to by the professor rather
>> than 3.14628, but I really don't understand why that number would be used on
>> a calculator rather than 3.14159.  Having said that, I can see where one
>> might multiply by 22 and divide by 7 even if that is not quite as accurate.
>> The professor may have had a reason for taking the approach he did.
>> 
>> Best regards,
>> 
>> Steve Jacobson
>> 
>> -----Original Message-----
>> From: Blindmath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of Sabra
>> Ewing via Blindmath
>> Sent: Friday, November 11, 2016 5:49 PM
>> To: Blind Math list for those interested in mathematics
>> <blindmath at nfbnet.org>
>> Cc: Sabra Ewing <sabra1023 at gmail.com>
>> Subject: Re: [Blindmath] A Student's Question
>> 
>> I have no idea where it comes from. It is 3.146 and then the 28 comes from
>> somewhere. I'm not the one who picked it. I just know that for basically
>> every math class I have been in, that is what they say to use for pie. Ask
>> Professor MCcarthy. He probably knows.
>> 
>> Sabra Ewing
>> 
>>> On Nov 11, 2016, at 5:45 PM, Amanda Lacy via Blindmath
>> <blindmath at nfbnet.org> wrote:
>>> How do you get 3.14628 by rounding 3.14159...?
>>> 
>>> Amanda
>>> 
>>>> On 11/11/16, Sabra Ewing via Blindmath <blindmath at nfbnet.org> wrote:
>>>> All right, it is it repeating then, but a lot of math classes are using
>>>> 3.14628 if you don't have a Calculator with the pie button. I guess that
>> is
>>>> a rounded value or something. And it's the Sa circumference to the
>> diameter.
>>>> You were quibbling over the decimal number when that is more important.
>>>> 
>>>> Sabra Ewing
>>>> 
>>>>> On Nov 11, 2016, at 2:05 PM, Bill Dengler <codeofdusk at gmail.com> wrote:
>>>>> 
>>>>> 3.14628 repeating?
>>>>> No Sabra. NO.
>>>>> http://enwp.org/pi
>>>>> 
>>>>> Bill
>>>>>> On Nov 11, 2016, at 7:36 PM, Sabra Ewing via Blindmath
>>>>>> <blindmath at nfbnet.org> wrote:
>>>>>> 
>>>>>> Yes, that is for six followed by P. It is not the word pie. It is a
>> Greek
>>>>>> symbol that has a constant of 3.14628 repeating. Someone came up with
>> it
>>>>>> by comparing a circles ark to its circumference or something like that.
>>>>>> 
>>>>>> Sabra Ewing
>>>>>> 
>>>>>>> On Nov 11, 2016, at 9:40 AM, Zach via Blindmath <blindmath at nfbnet.org>
>>>>>>> wrote:
>>>>>>> 
>>>>>>> When I use the Nemeth tutorial on my BrailleNote Apex it says '46
>> 1234'
>>>>>>> is
>>>>>>> pi.
>>>>>>> 
>>>>>>> Zachary Mason
>>>>>>> M.S. Student
>>>>>>> Animal and Dairy Sciences
>>>>>>> Mississippi State University
>>>>>>> 
>>>>>>> -----Original Message-----
>>>>>>> From: Blindmath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of
>>>>>>> derek
>>>>>>> riemer via Blindmath
>>>>>>> Sent: Thursday, September 29, 2016 1:35 PM
>>>>>>> To: Blind Math list for those interested in mathematics
>>>>>>> <blindmath at nfbnet.org>
>>>>>>> Cc: derek riemer <Derek.Riemer at Colorado.EDU>
>>>>>>> Subject: Re: [Blindmath] A Student's Question
>>>>>>> 
>>>>>>> No.
>>>>>>> 
>>>>>>> .p would probably be written as (46, 56 1234) or maybe evenn (456 256
>>>>>>> 1234)
>>>>>>> 
>>>>>>> I've never seen this in mathematics though. I don't know if it's
>> valid.
>>>>>>> 
>>>>>>>> On 9/29/2016 12:15 PM, ALLEN PURVIN via Blindmath wrote:
>>>>>>>> Hi,
>>>>>>>> A student asked me a Nemeth question and I do not know the answer. I
>>>>>>>> am
>>>>>>> sure people here do, so thank you.
>>>>>>>> What is the difference between .p (decimal point, p) and pi (the
>> Greek
>>>>>>> symbol) in Nemeth?  Aren't they both 4,6; 1,2,3,4?
>>>>>>>> I understand that in context, the distinction may be more clear.  But
>>>>>>> without?
>>>>>>>> Thank you,
>>>>>>>> - allen
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>> ------------------------------------------------------------------------
>>>>>>> 
>>>>>>> Derek Riemer
>>>>>>> 
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