Mathematics, 12.07.2019 17:30 tammydbrooks43
Find the circumference of a circle if the area is 300 square centimeters.
Answers: 2
![\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=300 \end{cases}\implies 300=\pi r^2\implies \cfrac{300}{\pi }=r^2 \implies \sqrt{\cfrac{300}{\pi }}=\boxed{r}\\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \textit{circumference of a circle}\\\\ C=2\pi r~\hspace{5em}C=2\pi \left( \boxed{\sqrt{\frac{300}{\pi }}}\right)\implies C\approx 61.399602476789](/tpl/images/0081/7340/79bc6.png)
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Find the circumference of a circle if the area is 300 square centimeters....
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