$70.6\ mm^2$

$616mm^2$

$20.2mm^{2\ }$

$282.3mm^2$

$\frac{x}{360}\times\frac{22}{7}\times\left(9m\right)^2$

$\frac{c}{360}\times\frac{22}{7}\times\left(9m\right)^2$

$\frac{x}{360}\times\frac{22}{7}\times9m$

$\frac{c}{360}\times\frac{22}{7}\times9m$

$\frac{r}{360}\times\pi\times83^2$

$\frac{83}{360}\times\pi\times r$

$\frac{83}{360}\times\pi\times r^2$

$\frac{r}{360}\times\pi\times83$

$50.3cm^2$

$165.7cm^2$

$266.3cm^2$

$31cm^2$

$309cm^2$

$113cm^2$

$5544cm^2$

$132cm^2$

$66cm^2$