Question

If radius of a circle is r, then the area of a sector of
angle O is​

Answer 1

Step-by-step explanation:

Area of a sector

$\frac{1}{2} \times {r}^{2} \times \alpha$

Where r is a radius

And alpha is the angle of sector

Answer 2

Step-by-step explanation:

$\boxed{\mathbb {G} \mathbb{i}ven : - }$

$\implies \mathtt{radius \: o f \: circle = r}$

$\implies \: angle = \theta$

$area \: of \: sector = \frac{ \theta}{360} \times \pi {r}^{2}$