First, to find the circumference, we can use the formula:
[tex]C=2\pi r[/tex]Where C is the circumference and r is the radius.
So, for r = 3, we have:
[tex]\begin{gathered} C=2\cdot3.14\cdot3 \\ C=18.84\text{ cm} \end{gathered}[/tex]Now, to calculate the area, we can use the formula:
[tex]A=\pi r^2[/tex]So we have:
[tex]\begin{gathered} A=3.14\cdot3^2 \\ A=3.14\cdot9 \\ A=28.26\text{ cm}^2 \end{gathered}[/tex]