Question

Find the area of the sector (in $c{m}^2$) whose arc length and radius are $10cm$ and $5cm$ respectively.

Answer 1

$l=10cm,r=5cm$
$\therefore A($sector$)=\frac{r}{2}\times l($arc$)$
$=\frac{5}{2}\times 10$
$=25c{m}^2$