Answer:
113.1 square mm
Step-by-step explanation:
A=πr2=π·62≈113.09734
[tex]= 36\pi \: {mm}^{2} \\ [/tex]
[tex]area = \pi {r}^{2} \\ = \pi \times 6 \times 6 \\ = 36\pi \: {mm}^{2} [/tex]