Question

Find the exact area of a circle having the given circumference.

8

Answer 1

that suppose to 8pi

Answer 2

First find the radius by using the formula:
\[C=2\pi r\]

Answer 3

okay! then do i use that formula?

Answer 4

Yes. That's what I meant when I said find the radius by using that formula.

Answer 5

thank you thank you thank you!!

Answer 6

Did you find the radius?

Answer 7

its 4 right?

Answer 8

yes. Now that you know the radius is 4, you can find the area by using the area formula. Do you know it?

Answer 9

yes, and then it comes out as 50. 26 right as the answer?

Answer 10

It said to find the EXACT area. That means leave it in terms of pi

Answer 11

so 16pi?

Answer 12

Very good!!

Answer 13

thank you!! haha

Answer 14

yw