The area is 84.
What I do it cut the polygon into something easier like a square and rectangle.
Rectangle: 6•12=72
Square: 4•3=12
Add them together and you have 84
<span>π </span>* 6 = 18.8495559215 / 4 = 4.71238898038
The answer in scientific notation is: 4.32 x 10^-2
