10
6.
8
8
13
6.
X = [?]
Enter the number that belongs in
the green box

(x)^2 = 8^2 + 6^2
or, x^2 = 64 + 36
or, x^2 = 100
or, x = √100
or, x = 10
The value of x is 10.
Hope it helps.
Do comment if you have any query.