[tex]\displaystyle \\
D =1 \frac{2}{5} = \frac{7}{5} ~cm = Diametru\\ \\
A_{_\bigcirc} = \frac{\pi D^2}{4} = \frac{ \Big(\frac{7}{5}\Big)^2 \times \pi}{4} = \frac{ \frac{49}{25} \times \pi}{4} = \frac{49 \pi}{25\times 4} = \boxed{\frac{49 \pi}{100} cm^2} [/tex]
