Question

The formula for the circumference of a circle is c=2 pie r. Use this formula to write a formula for the radius of a circle

Answer 1

radius = C / 2π :)

Explanation:

The circumference is 2πr, right?

Let's put this information into an equation :)

C = 2πr

Now, we can simply divide both sides by 2π here to isolate r (the radius) by itself, because that's what we want! (Something equal to the radius)

C / 2π = r

There's your answer! :)