Question

Find the area of a circle that has a radius of 9 mm. Use 3.14 for π.

Answer 1

Answer: 254,34 mm².

Step-by-step explanation:

$S{circle}=\pi R^2\\S{circle}=3,14*9^2\\S{circle}=3,14*81\\S{circle}=254,34\ mm^2.$

Answer 2

Hi :)

Let's first find the area of this circle

—————————

For finding the area of a circle we use

$\longrightarrow\sf{A_{\circ}=\pi r^2}$, where only r (radius) is squared

$\textit{We know that :}\begin{cases} \sf{Radius = 9 mm} \\ \sf{\pi =3.14} \end{cases}}$

Thus

$\longrightarrow\sf{A_{\circ}=3.14\cdot9^2}$

$\longrightarrow\sf{A_{\circ}=3.14\times81}$

$\longrightarrow\sf{\underline{A_{\circ}=254.34\: mm}}$

$\tt{Learn\:More;Work\;Harder}$

:)