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)

Question

Responses

r=Cπ/2
r equals Start Fraction upper C pi over 2 End Fraction

r=C/2π
r equals Start Fraction upper C over 2 pi End Fraction

r=C/π
r equals Start Fraction upper C over pi End Fraction

r=2πC

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 would divide both sides of the equation by \( 2\pi \).

Starting with the original formula: \[ C = 2\pi r \]

To isolate \( r \): \[ r = \frac{C}{2\pi} \]

Thus, the correct rearranged formula is:

r = C / (2π)

So the correct response is: r = C/2π
(r equals Start Fraction upper C over 2 pi End Fraction)