If the circunference of a circle is 10mtrs, what is the diameter?

Sorry to ask but i have forgotten the formula and the value of Pye....

Appreciate someone replying with the answer

Thanks

The diameter is 3.18 M. 10/3.142 = 3.18m

C = pi x D therefore D = C/pi > 10/pi = 3.183 Meters

circumference = (pi)(diameter) = 10 x 3.1415 = 31.415

BTW, Mr Google knew, I also forgot.

http://www.onlinemathlearning.com/circumference-of-circle.html

Mac

3.18 m

life of pi

Thanks fellas.....much appreciated from a OLD man..

You putting a swimming pool in Weegee?

So far 3 slightly different answers!

Edited June 7, 201313 yr by krisb

Nope....got one already.

Pi is 22/7, so there isn't any exact answer, but you can get close enough depending on your tolerances.

Pi is 22/7, so there isn't any exact answer, but you can get close enough depending on your tolerances.

Pi is not 22//7. Pi is an irrational number, which means that you can't make a fraction of it with 2 integers.

Pi is 3.1415926.... a non-repeating decimal.

Circumference of a circle = 2 x pi x radius.

PiR² (Pi R Square). This will give you the area within the circle.

2PiR (2 times Pi time R) will give you the circumference. 2 PiR = Circ.

Pi is approx. equal to 3.1416.

If circumference of circle is 10 meters 2 PiR = Circ, 2 PiR = 10 meters

First you have to figure out the radius then multiply that by to to get diameter.

to get that ... 10 must be divided by 2Pi or 10 divided by 6.2832

Result for R or radius is 1.5915

To get diameter - multiply Radius by 2 or 1.5915 * 2 = 3.1830 meters

my math is rusty. please check.

Pi is 22/7, so there isn't any exact answer, but you can get close enough depending on your tolerances.

Pi is not 22//7. Pi is an irrational number, which means that you can't make a fraction of it with 2 integers.

That's true but I remember in high school when we used slide rules that was what we were told to use. Yes, slide rules do date me.

Slide rules came after me...everything posted is a great help, as i said....Thanks

By the time i read all your posts, things started flowing back.....now where did I leave the measuring tape.

When I was in a previous job I noticed a chap taking great care measuring and cutting paving slabs.

"At my place of employment we can measure distances with an error of one millionth of an inch" I told him.

"That's nae good to me... in this job ye've got to be dead on"

SC

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

Big chief had three daughters who got married.

One got a hippopotamus skin for a wedding present the other two got buffalo hides.

After 9 months hippo' squaw had twin boys the othe other two one son each.

This proves that the sons of the squaw on the hippopotamus is equal to the sons of the squaws on the other two hides.

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

We had a calculator....

An Abacus

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

Yeah....And can you remember when you used to scratch formulats in the wooden desk.....

now to work on my englush.....aaaah too hard...back to testing the JD....

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

Yeah....And can you remember when you used to scratch formulats in the wooden desk.....

Yes, and formula in ink on my wrist hidden by my sleeve , don't tell anyone eh.

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

I remember when calculators didn't exist

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

Yeah....And can you remember when you used to scratch formulats in the wooden desk.....

Yes, and formula in ink on my wrist hidden by my sleeve , don't tell anyone eh.

huh....that ink will give you blood poisoning in later life.....

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

I remember when calculators didn't exist

Most here do. Only the Hi-So could afford them, they were the size of an SUV.

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

I remember when calculators didn't exist

Most here do. Only the Hi-So could afford them, they were the size of an SUV.

AND....they never told us about the batteries either....threw so many away, later in life

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

I think they are still not allowed.

However when I did my GCSEs they were allowed - I remember writing all the formulae on the inside of the cover in pencil.

Thanks fellas.....much appreciated from a OLD man..

Do you remember the days at school where calculators were not allowed. I do.

I think they are still not allowed.

However when I did my GCSEs they were allowed - I remember writing all the formulae on the inside of the cover in pencil.

GCSE's were well after my time.

After ten Times table i gave it away......waste of time

Sundown on Friday has arrived.....SeeYa, it's JD time