Question

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

Answer 1

Answer: 254,34 mm².

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

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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*81}`

`\longrightarrow\sf{\underline{A_(\circ)=254.34\: mm}}`

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

:)