if the radius of a circle is 4cm, what is that area?

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Guest Mar 17, 2015

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If the radius of a circle is 4cm, what is that area ?

$\mathrm{Radius} \quad r = 4\ cm \qquad \mathrm{Area}_{Circle}\quad A =\ ?$

$\boxed{ A = \pi \cdot {r^2} }$

$A = \pi \cdot 4^2 \ cm^2\\ A = \pi \cdot 16\ cm^2 \\ A = 3.14159265359 \cdot 16\ cm^2 \\ A = 50.2654824574 \ cm^2 \\ A \approx 50.27 \ cm^2$

heureka Mar 17, 2015

heureka · Answer 1 · 2015-03-17T09:58:09

If the radius of a circle is 4cm, what is that area ?

$\mathrm{Radius} \quad r = 4\ cm \qquad \mathrm{Area}_{Circle}\quad A =\ ?$

$\boxed{ A = \pi \cdot {r^2} }$

$A = \pi \cdot 4^2 \ cm^2\\ A = \pi \cdot 16\ cm^2 \\ A = 3.14159265359 \cdot 16\ cm^2 \\ A = 50.2654824574 \ cm^2 \\ A \approx 50.27 \ cm^2$