Question

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Answer 1

Find the side length of the larger square, and find the side length of the smaller square.
Then the shaded area is largeLength^2 - smallLength^2.
largeLength^2 give you the area of the large square.
smallLength^2 gives you the area of the small square

Answer 2

As I see the the picute, you have a large squar and a small square.
The shaded area is the area of the large square minus the area of the small square

Answer 3

so - find the side length of the large square. See if you extend the line that shows 9 all the way to the top left corner, then you have a triangle with the the hypertonuse = 18.
Then you can find the side length
\[a^2+b^2=c^2\]
You have c and a = b, so
\[2b^2 = c^2 => b= \sqrt{\frac{c^2}{2}} =>b = 9\sqrt{2}\]
(I hope my calculation is correct), so that is the side length of the large square.

Answer 4

I think that should work.