Explicación paso a paso:
[tex]area = \pi {r}^{2} [/tex]
[tex]as = \frac{3}{4} \pi {r}^{2} [/tex]
[tex]as = \frac{3\pi {(12cm)}^{2} }{4} = 339.292 {cm}^{2} [/tex]
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Explicación paso a paso:
[tex]area = \pi {r}^{2} [/tex]
[tex]as = \frac{3}{4} \pi {r}^{2} [/tex]
[tex]as = \frac{3\pi {(12cm)}^{2} }{4} = 339.292 {cm}^{2} [/tex]