How do you solve for r in $C=2(pi)r$ ?

Question

107577 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-03-08T09:00:57

$r=C/(2pi)$

This is the formula for Circumference $C$ of a circle given the radius $r$ , where $pi=22/7$ or $3.14$ or $3.14159$ or $3.1416$ .

Hence $Cxx1/(2pi)=2pir/(2pi)$ or $C/(2pi)=r$ i.e. $r=C/(2pi)$

How do you solve for r in C=2(pi)rC=2(pi)r?