i need someone whos really good at geometry to help with my finals pleaseeeeee

Answer:
8 in
Step-by-step explanation:
A 45-45-90 triangle is a special triangle with side length ratio 1 : 1 : β2
The legs are equal in length.
The length of the hypotenuse is β2 times the length of a leg.
Therefore, if the hypotenuse of a 45-45-90 triangle is 8β2 inches, the leg lengths are 8 inches each in length.