Question

What is the exact circumference of a circle with a radius of 12 inches?

Answer 1

The radius of a circle is half the length of the circumference. 
So multiply 12 by itself and you get 24.
The answer is C.

Answer 2

Answer:

C. $24\pi$ inches.

Step-by-step explanation:

We are given that,

The radius of the circle = 12 inches

Since, the circumference of a circle = $2\pi r$, where r= radius.

Substituting r = 2 in the formula, we get,

Circumference of a circle = $2\pi \times 12= 24\pi$ inches

Hence, the circumference of the circle is $24\pi$ inches.

So, option C is correct.