Questão 110647

\(\frac{\pi R^2}{8}\) .

R² \(\big ( \) \(\frac{\pi-1}{4}\) \(\big )\)

R² \(\big (\) 2 - \(\frac{\pi}{4}\) \(\big )\).

R² \(\big (\)\(\frac{\pi}{2}\) - 1\(\big )\).

\(\frac{\pi R^2}{16}\) .