Question

The area of a circle is 16cm^2. What is the circumference in centimeters? Express in terms of Pie.

Answer 1

C≈14.18 cm

Use the formula:
A= πr^2
C=2πr

Solve for C-
C=2 [(Squarroot)πA]=2·[(squarroot)π·16]≈14.17963cm

Answer 2

My thing said that's wrong.

Answer 3

then maybe its 256cm^2
The area of the circle is given by \(A=\pi r^{2}\). We know that \(A=256\text{\ cm}^{2}\). Therefore, we have the equation \(\pi r^{2}=256\).
Divide both sides of the equation by \(\pi \): \(r^{2}=\frac{256}{\pi }\)
Take the square root of both sides: \(r=\sqrt{\frac{256}{\pi }}\) Simplify the square root: \(r=\frac{\sqrt{256}}{\sqrt{\pi }}\) \(r=\frac{16}{\sqrt{\pi }}\)

Answer 4

it's 8 Pie
16/2
c=2 times Pie times 4
c= 8 Pie

Answer 5

ur question doesn't divide tho

Answer 6

but alr

Answer 7

Hey that's what delta math told me to do so idk

Answer 8

and the dividing is how you get the radius

Answer 9

oh ok

Answer 10

sorry

Answer 11

It's ok, thankyou for trying to help though!

Answer 12

also 2πr can be switched out for dπ if its easier for ya

Answer 13

Diameter?

Answer 14

yes

Answer 15

Alr, makes sense. Thanks!