How do I find the radius of a circle from its circumference?

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Answer 1 · 2018-05-11T13:01:13

$r = C/(2pi)$

The Circumference of a circle goes with this formula;

$C = 2pir$

Where';

$C = "Circumference"$

$pi = 22/7 or 3.142$

$r = "radius"$

Hence you can find the radius of the circle from the circumference..

$C = 2pir$

Divide both sides by $2pi$

$C/(2pi) = (2pir)/(2pi)$

$C/(2pi) = (cancel(2pi)r)/cancel(2pi)$

$C/(2pi)= r$

$r = C/(2pi)$