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Telepanpolyna
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Aria unui cerc este de 16 π cm^2 .Aflati lungimea cercului.Va rog mult urgent

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[tex]\displaystyle\bf\\Formula~pentru~aria~cercului~este:\\\\A=\pi R^2\\\\\pi R^2=16\pi~~\Big|:\pi\\\\R^2=16\\\\R^2=4^2\\\\\boxed{\bf R=4~cm}\\\\Formula~pentru~lungimea~cercului~este:\\\\L=2\pi R\\\\L=2\pi\times4\\\\\boxed{\bf L=8\pi~cm}[/tex]

 

 

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