Question

Find the exact area of a circle having the given circumference 8 PI

Answer 1

\[C=2 \times \pi \times r\]\[8\pi=2 \times r\]\[8\pi \div 2 = 2r \div2\]\[r=4\]

Answer 2

Now what would we do next?

Answer 3

4 times 4 =16

Answer 4

Then?

Answer 5

16 times 3.14

Answer 6

Yup! Now what is the answer?

Answer 7

Which I get 50.24 but my computer says this is wrong

Answer 8

Let me see something real quick

Answer 9

Try 16pi

Answer 10

It said to find the exact so keep it in terms of pi.

Answer 11

@Jamesreed30

Answer 12

Here you have to work backwards, since you are given the circumference of a circle and need to find the radius. Once you have the radius, you can find the area of the circle.

What is the formula for the circumference of a circle of radius r? Solve it for the variable r.