It's shaped like this:
This means the area is the area of the a 17x17 square plus half the area of a circle with diameter Θ=17.
Therefore the area of the square is 17^2 = 289
The area of the circle is π(8.5)^2 = 226.98, which divided by 2 is 113.49
The overall area is 289 + 113.49 = 402.49
