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substitute 37.7 meters instead of C. What do you get?

\[\frac{ c }{ 2\pi } = r\] where C is your circumference

I'm confused

start with C = 2πr
replace "C" with 37.7

37.7 = 2πr
now solve for r

i dont know how to do this

divide both sides by 2π

... how do you divide that the π confuses me

π is just a number, it's equal to about 3.14

18.85? & I'm unsure how to divide the second one ?

18.85/3.14 = ?
(use a calculator)

\[\frac{ 37.7 }{ 6.2831 }\]

it gives me a big number

I'm clearly horrible at math

\[\frac{ 37.7 }{ 2*3.14.159 }\]

err seems I added 1 to many . there... but that will give you your r value

it should be #.xxxxxxxxx but you can ignore the xxxxxxx part as they are mostly 0

or just use an online calculator
https://www.bing.com/search?q=37.7%2F6.2831&PC=U316&FORM=CHROMN

6.0002228199455698 ?

yes

good! that s the radius

but 6 will do

okay? still kind of lost

you're done, you just found that the radius is equal to 6

I'm just a little confused how we got there lol

the formula you were given was C = 2πr

hope that helps :)

i think i'm dumb cause i dont get it lol

|dw:1444525785727:dw|

|dw:1444525809654:dw|

do you understand this part?

yes

yes

good, now we want to find the radius

so we want r by itself on the other side

|dw:1444526056008:dw|

do you understand that part?

yeah

it's making more sense

good, so r = C/(2π) = 6

\[\frac{ 1 }{ 2π } * C = 2πr * \frac{ 1 }{2π} \rightarrow r = \frac{ C }{ 2π } \]

heh guess I should have made a picture :)

I GET IT NOW!