Question

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

Answer 1

We can get the circumference of any circle in terms of the radius with this formula. C = 2$\pi$r.

Where r is the radius of the circle.

And we will use 3.14 for $\pi$.

Plug in all the values.

C = 2 * 3.14 * 2

C = 12.56

So, the circumference of the circle is 12.6 inches when rounded to the nearest tenth.

Answer 2

There is a mistake in your question here is my proof:
r=$\frac{C}{2 \pi}$

1. r=$\frac{6}{2 \pi}$
r≈0.95

2. r=$\frac{12}{2 \pi}$
r≈1.91

3. r=$\frac{24}{2 \pi}$
r≈3.82

4. r=$\frac{48}{2 \pi}$
r≈7.64