Question

Given the formula for the circumference of a circle, C=2πr
, how would you rearrange the formula if you were interested in finding the radius of the circle? (1 point)
Responses

r=Cπ2
r equals Start Fraction upper C pi over 2 End Fraction

r=2πC
r equals 2 pi upper C

r=Cπ
r equals Start Fraction upper C over pi End Fraction

r=C2π

Answer 1

To rearrange the formula for the circumference of a circle \( C = 2\pi r \) to solve for the radius \( r \), you can follow these steps:

1. Start with the original formula:
\[ C = 2\pi r \]

2. Divide both sides by \( 2\pi \) to isolate \( r \):
\[ r = \frac{C}{2\pi} \]

Based on the options provided, the correct rearranged formula for finding the radius is:

**r = \(\frac{C}{2\pi}\)**

This option is not explicitly listed, but the closest option among those might have been intended was:

**r = \(\frac{C}{\pi}\)** (which does not properly represent the rearranged equation).

So the correct expression from the options is not available, but the rearranged formula would indeed be:

**r = \(\frac{C}{2\pi}\)**.