Question

Calcule o setor circular da figura acima/Me ajudem plssss

Answer 1

$\frac{360}{30} = \frac{\pi \times {r}^{2} }{x} \\ \frac{360}{30} = \frac{3.14 \times {20}^{2} }{x} \\ \frac{360}{30} = \frac{1265}{x} \\ 12 = \frac{1265}{x} \\ x = 105.4 \: cm$