Question

Min knows that pi times radius equals 9.42 cm. What would she need to do to find the area?

Answer 1

Step-by-step explanation:

Consider the provided information.

It is given that she knows $\pi \times r = 9.42$

Area of the circle is: $A=\pi r^2$

Now consider the provided  information.

$\pi \times r = 9.42$

Step 1:

Squaring both sides.

$(\pi \times r)^2 = (9.42)^2$

$\pi \times \pi \times r^2 = (9.42)^2$

Step 2:

Now divided both the sides by π.

$\pi r^2 = \frac{(9.42)^2}{\pi}$

$A=\pi r^2 = \frac{(9.42)^2}{\pi}$

Hence, by following the above steps she can find the area of circle.

Answer 2

$\bf \textit{area of a circle}\\\\ A=\pi r^2\\\\ -------------------------------\\\\ \textit{now, we know that }\pi r=9.42\impliedby \textit{let's square both sides} \\\\\\ (\pi r)^2=(9.42)^2\implies (\pi ^2r^2)=9.42^2\implies \pi \pi r^2=9.42^2 \\\\\\ \stackrel{area}{\pi r^2}~~=~~\cfrac{9.42^2}{\pi }$