Question

se Joana fosse colocar catupiry na borda da pizza inteira de quantos centímetros ela precisaria, area total de 486 cm2​

Answer 1

$area = \pi \times {r}^{2} \\ 486 = 3 \times {r}^{2}$

$area = \pi \times {r}^{2} \\ \pi = 3 \\ \\ 486 = 3. {r}^{2} \\ {r}^{2} = \frac{486}{3} \\ {r}^{2} = 162 \\ r = \sqrt{162} \\ r = 12.72 \\ \\ comprimemto = 2.\pi \times r \\ c = 2 \times 3 \times 12.72 \\ c = 292.56cm$