Question

. The area of a circle is 198 square cm. a) Find the radius of the circle. (keep your answer in the form of a_/b (surd form)

Answer 1

Answer:

radius => $r = 3\sqrt7$ cm

Step-by-step explanation:

given:

area of circle = 198 cm²

area of circle = $\pi$$r^{2}$

$\pi$$r^{2}$ = 198

$r^{2} = \frac{198}{\pi}$  

$r^{2} = \frac{198*7}{22}$

$r^{2}=63$

$r=\sqrt{9*7}$

hence radius is

$r = 3\sqrt7$ cm

Hope it helps !