Question

Find the exact circumference of the circle.
http://media.education2020.com/evresources/647-11-01-00-00_files/i0160000.jpg

Answer 1

i divided 2 over 10 and i got 5square root of 2 is that right?

Answer 2

i really dont know how to do it

Answer 3

the radius of the circle is indeed 5qrt(2), but you were ask to find the area of the circle

Answer 4

the formula is \[2\pi r^2\]

Answer 5

I mean the circumference

Answer 6

C = 2pi r

Answer 7

okay :) what else

Answer 8

plug and chug

Answer 9

so i do 2 times 10...?

Answer 10

yep

Answer 11

oh wtf... i did it wrong! :(
so its 20 square root over 2

Answer 12

do i do the same thing with every problem like this?

Answer 13

no it's 10pi sqrt(2)

Answer 14

10 quare root of 2?

Answer 15

fawwkk im confused