[Blindmath] A Student's Question

Sat Nov 12 06:40:46 UTC 2016

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
>>>>>>
>>>>>> * Department of computer science, third year undergraduate student.
>>>>>> * Proud user of the NVDA screen reader.
>>>>>> * Open source enthusiast.
>>>>>> * Member of Bridge Cu
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>>>>>>
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