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Thread: pi

  1. #1
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    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

  2. #2
    Super Member Jan in VA's Avatar
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    Ohhhh, my head hurts!!

    You're so funny!

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  3. #3
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    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 View Post
    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
    Blue Cat

    Every life should have nine cats.

  4. #4
    Power Poster lynnie's Avatar
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    Pi...i like mine cherry!!! (Lol)

  5. #5
    Super Member suebee's Avatar
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    Huh?? LOL that is very odd.
    SUEB

  6. #6
    Super Member suebee's Avatar
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    ooh, good one, hahaha

    Quote Originally Posted by lynnie View Post
    Pi...i like mine cherry!!! (Lol)
    SUEB

  7. #7
    Power Poster Jingle's Avatar
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    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.
    Another Phyllis
    This life is the only one you get - enjoy it before you lose it.

  8. #8
    Super Member teacherbailey's Avatar
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    Help with college algebra

    Quote Originally Posted by Jingle View Post
    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......
    Mistakes are just opportunities to invent a new quilting technique!

  9. #9
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    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.

  10. #10
    Super Member Rann's Avatar
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    I want to see the movie that just came out.
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