Question

What is the area of a circle with a radius of 21?

Answer 1

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`\textsc{heya!}`

we need to find the area of a circle with a radius of 21.

we also need a formula for this, which is

⇒
`\bold{A=\pi r^2}`

the known value is r, radius, 21.

after substituting the value into the formula, we obtain:

⇒
`\bold{A=\pi (21)^2}`

now we multiply the radius times itself:

⇒
`\bold{A=\pi *441}`

which can be written as

⇒
`\bold{A=441\pi}`

and finally, multiply the values

⇒
`\bold{A=1385.4\;units\;^2}`

`\textsc{hopefully\:helpful}`

by:
`\textsc{$^da_nc^in_g$}`

have a great rest of your day ahead ~ = )