Question

A circle has a diameter of 15 feet. What is the circumference of the circle? (Express your answer using π.)

Answer 1

(Express your answer using pi

Answer 2

@conain007 @AnswerMyQuestions

Answer 3

Same formula.

Answer 4

2 x pi x radius.

Answer 5

But it gives us the diameter. And the radius is half the diameter, so what is your answer?

Answer 6

15 / 2 =7.5

Answer 7

Yes.

Answer 8

So what is the circumference?

Answer 9

47.1 !

Answer 10

Yup!

Answer 11

but thats not any of the choices :p

Answer 12

Hmm, what are your choices?

Answer 13

The formula for the circumference of a circle is:

\(C = 2 \pi r\)

The diameter is 15, so the radius is 7.5.

\(C = 2 \pi (7.5)\)

What's 7.5 * 2?

Answer 14

Can you multiply that?

Answer 15

pi/15 feet

15pi feet

15/pi feet

30pi feet

Answer 16

It gives us the same answer we ended up with.

Answer 17

Multiply 7.5 * 2 and that is your answer in pi

Answer 18

It would be 15 again.

Answer 19

Oh..The choices are like that... :P

Answer 20

Yes, so the answer is \(15 \pi\).

Answer 21

@iGreen. and @AnswerMyQuestions Thanks :)

Answer 22

Np

Answer 23

No problem. :)