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 ~ = )