Question

Given the formula for the circumference of a circle, C=2πr, how would you rearrange the formula

Answer 1

To rearrange the formula for the circumference of a circle, \( C = 2\pi r \), you can solve for the radius \( r \). Here's how you can do it:

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

2. To isolate \( r \), divide both sides of the equation by \( 2\pi \):
\[
r = \frac{C}{2\pi}
\]

So, the rearranged formula to express the radius in terms of the circumference is:
\[
r = \frac{C}{2\pi}
\]