It dont seem right!!!

[mrspask]

THE CIRCUMFERENCE OF A CIRCLE IS 22/7 x THE DIAMETER SO ---IF YOU INCREASE THE DIAMETER OF A CIRCLE FROM 2 INCHES TO 3 INCHES,THE INCREASE IN CIRCUMFERENCE IS 3.142 INCHES.
IF THE CIRCLE DIAMETER IS 1 MILE[66360 INCHES]AND IS INCREASED BY 1 INCH,THE RESULT IS THE SAME-3.142!
IF THE EARTH WAS A PERFECT SPHERE DOING THE SAME CALCULATION WITH THE EQUATOR WOULD YIELD THE SAME 3.142 INCHES!!!
LIKE I SAID, IT DONT SEEM RIGHT.
PLEASE WILL SOMEONE PUT ME RIGHT!

[boxtops]

The 3.142 is the ratio of the circumference to the diameter, not a measurement - the ratio will always remain the same, no matter how big the circle.

[johnny37]

That's 22/7. 3.142 recurring. Computers have been running trying to find out when it ends for years.

[daisya]

Try not to shout mrspask (all capitals)....you're deafening me and it's against the rules (sharp intake of breath lol).

[SeaJayPea]

I know what you mean. It is counter-intuitive, but it is indeed the fact.

A couple of examples:

Circle with 10 inch diameter has a circumference of 31.42 ins
Circle with 11 inch diameter has a circumference of 34.562 ins and the difference is 1 x 3.142 inches.

Circle with 10,000 ins diameter has a circumference of 31,420 ins
Circle with 10,001 ins diameter has a circumference of 31,423.142 ins and the difference is 1 x 3.142 inches.

[factor-fiction]

Yes, if you put a rope along the ground on the equator all around the earth and another rope 1 metre above the ground all the way round the earth, the second rope would only be around 6 metres longer

[vascop]

It doesn't seem right to you, but it seems exactly right to me, mate!!

[jomifl]

If the earth was a cube and you increased it's sides by one inch you would get an extra inch on each side so it's (square) diameter would increase by 4 inches.

[beso]

johnny37 // That's 22/7. 3.142 recurring.//

No it isn't. Recurring means a repeating pattern in the numbers. Pi has been calculated to 10 Trillion digits and there is still no recurring pattern.

[factor-fiction]

... and Pi is not 22/7 either- that is just an approximation for it

[nescio]

and it is 142857 which recurs in the decimal expansion of 22/7, not just 142

Incidentally, if you need a rational approximation to pi, 355/113 is good enough for most purposes.

[vascop]

Why do you call yourself nescio when it should d be scio?

[nescio]

Irony ?

[nescio]

err..
I think you mean 3.14159

[wildwood]

I don't get it either.

factor30 ...//Yes, if you put a rope along the ground on the equator all around the earth and another rope 1 metre above the ground all the way round the earth, the second rope would only be around 6 metres longer//.

I make it over 6000meters! Where did I go wrong?

[wildwood]

Ooops, I see it now. duh.

[mrspask]

For the purpose of this little observation,it doesnt matter if Pi is 22/7 or 3.142******,its obvious I did geometry at school a long long time ago but I cant get my head around" 3.142 inches"!!!

[johnny37]

Sorry! Of course I meant 'and so on'. Would 'ad infinitum' be correct?

[WyeDyed]

How to remember Pi to 14 decimal places:
3 Yes
.
1 I
4 want
1 a
5 drink
9 alcoholic
2 of
6 course
5 after
3 the
5 heavy
8 chapters
9 involving
7 quantum
9 mechanics

A slight deviation from the OP but I thought you may like it.