You would shade in 135 of the squares in the grid(s)
The dashed line is because the sign is greater than to be a solid line it has to be equal to or greater than and to the shading means any point on there works for the equation easiest way to test where you should shade is by plugging into the equation the point (0,0)
Letter B or π is an irrational number, therefore it's the answer.
A^2 +b^2 =c^2
c^2 will be your hypotenuse
Hope that helps