Find the area of the shaded region. leave answers in simplest radical form
1) (isosceles) b= 40 in. side= 29 in.

In order to answer this question, one would need either a far more detailed description than the one given in the question, or else a brief peek at the shaded region. 
I would bet money that there's a beautiful, clear drawing right there where you copied the question from, but that you decided not to share the drawing.

Idon’t know what the answer is i wish i could