Question

http://media.education2020.com/evresources/2072227_circle_in_circle.png
Find the circumference of the larger circle if the area of one of the smaller circles is 48 pi in2. Will give medal and fan and testimony

Answer 1

" the area of one of the smaller circles is 48 pi in2"

use this info to find the radius of the smaller circle

Answer 2

Area of a circle

\[\Large A = \pi*r^2\]

Answer 3

Would 48 be the diameter?

Answer 4

no, 48pi is the area

Answer 5

A = 48pi

Answer 6

48 = PI * r^2
r^2 = 48 / PI

Answer 7

So would i do 48*pi? Im so confused on this :(

Answer 8

\[\Large A = \pi*r^2\]

\[\Large 48\pi = \pi*r^2\]

\[\Large 48 = r^2\]

the pi's cancel. Solve for r

Answer 9

So this\[\sqrt{48}=r ^{2}\]

Answer 10

more like \[\Large r = \sqrt{48}\]

Answer 11

you can simplify that radical

Answer 12

I got 6.92 for the answer

Answer 13

Here's a quick answer:
It appears that the smaller circle has a radius that is .5 the radius of the larger circle.
When calculating area, when you double the size the area increases FOUR times.
SO, area of larger circle = 4 * 48 = 192

Answer 14

it wants the circumference of the larger circle

Answer 15

Im really sorry that confused me even more :( like all my answer choices are in radical form

Answer 16

What are your answer choices?