if the angles are 90,45,45 so the sides except hypotenuse are congruent
and the hypotenuse is equal to :
[tex] {6 \sqrt{2} }^{2} + {6 \sqrt{2} }^{2} = {x}^{2} \\ {8.5}^{2} + {8.5}^{2} = {x}^{2} \\ 72.25 + 72.25 = {x}^{2} \\[/tex]
[tex] {x}^{2} = 144.5 \\ x = 12[/tex]
the answer is 12
hope this helps
