Question

The area of a sector of a circle of radius 21 cm 231 cm2
. Find its central angle

Answer 1

No idea sorry... well you can check the same on google

Answer 2

The central ange is "60°".

Explanation:

Given,

The area of a sector of a circle = 231 $cm^{2}$ and radius(r) = 21 cm

To find, its central angle = ?

We know that,

The area of a sector of a circle $= \dfrac{\theta}{360} \times \pi r^{2}$

⇒$\dfrac{\theta}{360} \times \pi r^{2} = 231$

⇒ $\theta = 60$

Hence, the central ange is 60°.