Question

I need the area of circle that is 2" in with the DIA of the disk is 8.5"

Answer 1

what??

Answer 2

I have a disk at is 8.5 inches in Dia. there is 2 inches of this disk I am trying to figure out the area.

Answer 3

so if we had a circle and you chopped off an end of it, how much area would it be? like this?

Answer 4

The 2 inches is the dia too (a complete circle) not a segment.

Answer 5

like this then? maybe?

Answer 6

yes something like that. I know the raduis is 4.25

Answer 7

let say the white part is the 2 "

Answer 8

ohhh...ok

Answer 9

diam/2 = 8.5/2 = 4.25 the area of the whole thing then is:

(4.25)^2pi

now remove the area of the inner circle which has the radius of 2.25

(4.25)^2 pi - (2.25)^2 pi = pi( 4.25^2 - 2.25^2)

Answer 10

13pi is what I come up with

Answer 11

Where does the 2.25 come from?

Answer 12

Thanks I think I figured it out!

Answer 13

:) I knew you could do it :)