pi
#1
Power Poster
Thread Starter
Join Date: May 2008
Location: MN
Posts: 24,666
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
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
#3
Junior Member
Join Date: Sep 2012
Location: Pacific Northwest
Posts: 121
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
laura
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
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
#7
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.
Spelling use to be the easiest thing for me but as I age, not so much.
#8
Help with college algebra
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.
Spelling use to be the easiest thing for me but as I age, not so much.