Solve for r C=2pir ; solve for r

$C = 2 π r$ ; solve for $r$

Rewrite the equation as $2 π r = C$ .

$2 π r = C$

Divide each term in $2 π r = C$ by $2 π$ and simplify.

Divide each term in $2 π r = C$ by $2 π$ .

$\frac{2 π r}{2 π} = \frac{C}{2 π}$

Simplify the left side.

Cancel the common factor of $2$ .

Cancel the common factor.

$\frac{2 π r}{2 π} = \frac{C}{2 π}$

Rewrite the expression.

$\frac{π r}{π} = \frac{C}{2 π}$

Cancel the common factor of $π$ .

Cancel the common factor.

$\frac{π r}{π} = \frac{C}{2 π}$

Divide $r$ by $1$ .

$r = \frac{C}{2 π}$