# pi

• 11-16-2012, 10:37 AM
bearisgray
pi
My calculator gives the value of pi as: 3.14159365359

My calculator give the value of 22/7 (3-1/7) as: 3.14285714286

22/7 has a repeating decimal as the value and, as far as I know, pi goes on forever.

Anyway -

for most purposes in my life - as in drafting a pattern - 22/7 - works well enough for most calculations.
0.00126 - a bit more than one-thousandth of an inch variation will probably work well enough with 'a scant quarter inch' seam
• 11-16-2012, 06:28 PM
Jan in VA

You're so funny!

Jan in VA
• 11-16-2012, 06:47 PM
Blue Cat
The calculator value is much more accurate. 22/7 is an approximation for use with fractions. As you say, however, either one is close enough to get you scant quarter seamline.

laura

Quote:

Originally Posted by bearisgray
My calculator gives the value of pi as: 3.14159365359

My calculator give the value of 22/7 (3-1/7) as: 3.14285714286

22/7 has a repeating decimal as the value and, as far as I know, pi goes on forever.

Anyway -

for most purposes in my life - as in drafting a pattern - 22/7 - works well enough for most calculations.
0.00126 - a bit more than one-thousandth of an inch variation will probably work well enough with 'a scant quarter inch' seam

• 11-16-2012, 06:51 PM
lynnie
Pi...i like mine cherry!!! (Lol) :)
• 11-16-2012, 06:52 PM
suebee
Huh?? LOL that is very odd. :)
• 11-16-2012, 06:53 PM
suebee
ooh, good one, hahaha

Quote:

Originally Posted by lynnie
Pi...i like mine cherry!!! (Lol) :)

• 11-16-2012, 07:13 PM
Jingle
My Granddaughter is taking college math and not getting it. I'm no good, I think the basics are plenty for the average person. I learned fractions by using them in cooking and baking, doubling recipes made them second nature to me. I do love calculators.

Spelling use to be the easiest thing for me but as I age, not so much.
• 11-18-2012, 04:24 AM
teacherbailey
Help with college algebra
Quote:

Originally Posted by Jingle
My Granddaughter is taking college math and not getting it. I'm no good, I think the basics are plenty for the average person. I learned fractions by using them in cooking and baking, doubling recipes made them second nature to me. I do love calculators.

Spelling use to be the easiest thing for me but as I age, not so much.

I teach math and will suggest that your granddaughter first see if there is a tutoring center at her college that can help. These are often staffed by math geeks who work there as part of their work-study financial aid. If not, there is a book called Algebra to Go (available on Amazon) that will help. It is part of a series that includes Math on Call and a couple more. These are not workbooks but are math reference books. I always find that they explain things clearly and simply, and use easy-to-understand drawings to help. Pi can be pretty straightforward if you have a good calculator and approximate it as 3.14, but some professors want it approximated as something longer then you end up rounding all of your answers and then the trouble begins......
• 11-18-2012, 07:31 AM
bearisgray
I still think that 22/7 is a good APPROXIMATION of the ratio of a circle's circumference to it's diameter.

It seems very logical to me from a metaphysical/numerological viewpoint.
• 11-18-2012, 11:20 AM
Rann
I want to see the movie that just came out.
• 11-18-2012, 02:39 PM
New knee
Who cares about one-thousandth of an inch!! Quilting is supposed to be fun, not requiring a math geek. If all the seams are the same, the quilt will look fine.
• 11-18-2012, 03:05 PM
roserips
Pi I would like apple please alamode!
• 11-18-2012, 06:51 PM
captlynhall
As that was flying over my head, I never even had a chance to look up. ;)
• 11-19-2012, 09:08 AM
chris_quilts
I'm making 3 for Thursday. Apple, pumpkin and banana cream pie.
• 11-19-2012, 09:19 AM
barny
Wo. Someone needs to call ER for bearisgray! LOL
• 11-19-2012, 07:48 PM
bearisgray
Just trying to say that 22/7 (3-1/7) is a close enough approximation to whatever the 'actual' value of pi is for most of my purposes.
• 11-20-2012, 11:55 AM
chris_quilts
Quote:

Originally Posted by bearisgray
Just trying to say that 22/7 (3-1/7) is a close enough approximation to whatever the 'actual' value of pi is for most of my purposes.

I totally agree with you.
• 11-20-2012, 05:18 PM
kateyb
Math was not my strong suite. I know how to use the 60 degrees on my quilting ruler to get a diamond, but don't ask me to explain it mathimatically.