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?

Answer 1

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

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

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

Now you have the formula rearranged to find the radius \( r \): \[ r = \frac{C}{2\pi} \]