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

254.34 mm²

56.52 mm²

63.59 mm²

28.26 mm²

Sagot :

Answer: 254,34 mm².

Step-by-step explanation:

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

Eliza3038269

Hi :)

Let's first find the area of this circle

—————————

For finding the area of a circle we use

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

[tex]\textit{We know that :}\begin{cases} \sf{Radius = 9 mm} \\ \sf{\pi =3.14} \end{cases}}[/tex]

Thus

[tex]\longrightarrow\sf{A_{\circ}=3.14\cdot9^2}[/tex]

[tex]\longrightarrow\sf{A_{\circ}=3.14\times81}[/tex]

[tex]\longrightarrow\sf{\underline{A_{\circ}=254.34\: mm}}[/tex]

[tex]\tt{Learn\:More;Work\;Harder}[/tex]

:)

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