I got this question wrong, so if someone can please help me with this, I would really appreciate it! Please and thank you!

Answer:
15 in.
Step-by-step explanation:
The area of the left-most square is 81 in.^2. Area = L*W (Length times width), and since we know squares are always equal on each side, we can do 9*9=81. That means the left side of the triangle is 9.
Then, we move to the bottom-most square. The perimeter is 48 in. As said before, we know all sides of a square must be equal. We will divide 48 by 4, as that's how many sides a square has (mind-blowing!), and we get 12. That means, using the Pythagorean Theorem, (9^2) + (12^12) = C^2. We can simplify this to 81 + 144 = C^2, or 225 = C^2 if you add those two numbers together. We can take the square root of both sides to get C = 15!
Answer:
Step-by-step explanation:
Area of one of the square=81in^2
Area of square=length×length
A=l^2
Which implies that
81=l^2
√81=√l^2
9=l
Therefore one of the length of the small square is 9
Perimeter of a square=4l
P=4l
Perimeter of the other square=48in
Which implies that
48=4l
48/4=4l/4
12=l
Therefore the length of the other square=12
The two lengths of the right angle triangle are 9 and 12 respectively
To find the length of the largest square we have to find other side of the triangle
Using the formula
a^2+b^2=c^2
a=9 b=12
9^2+12^2=c^2
81+144=c^2
225=c^2
√225=√c^2
15=c
Therefore the length of the other side of the triangle is 15
But the length of the side of the triangle=the side length of the largest square
Therefore the side length of the largest square=15
X=15