Euclidean disk
= Euclidean disk
{title2=$D_R$}
{wiki=Disk_(mathematics)}
The Euclidean disk of radius $R$ is $D_R=\{x\in\mathbb R^2:|x|\leq R\}$. Its area is $\pi R^2$.
= Euclidean disk
{title2=$D_R$}
{wiki=Disk_(mathematics)}
The Euclidean disk of radius $R$ is $D_R=\{x\in\mathbb R^2:|x|\leq R\}$. Its area is $\pi R^2$.