The formula of an area of a circle:
[tex]A_O=\pi r^2[/tex]
We have
r = 1.8 m
π ≈ 3.14
Substitute:
[tex]A_O=\pi\cdot1.8^2=3.24\pi\ m^2\approx3.24\cdot3.14=10.1736\ m^2\approx10.17\ m^2[/tex]
