# How do I convert the polar equation r=10 to its Cartesian equivalent?

$r = 10$
$\sqrt{{x}^{2} + {y}^{2}} = 10$
${\left(\sqrt{{x}^{2} + {y}^{2}}\right)}^{2} = {10}^{2}$
${x}^{2} + {y}^{2} = 100$