# How do you find the radius of a circle with an area of 80 cm 2?

May 14, 2018

$r = 5.046265044 c m$

#### Explanation:

$\pi {r}^{2} = a r e a$

$\pi {r}^{2} = 80$

${r}^{2} = \frac{80}{\pi}$

$r = \sqrt{\frac{80}{\pi}}$

$r = 5.046265044 c m$