By Isa McKenty

0

Posted: 2013-11-11

Radius of a Circle from its Area

Radius of a Circle from its Area

$$$r = \sqrt{A \over \pi}$$$

If you need to find the Radius ($$r$$) of a circle, and only have the Area ($$A$$) to work with, you can use this handy formula.

If you have the Circumference, use this formula: **www.automathic.org/152_radius-of-a-circle**