What is the value of x? 5 sqrt 2 10 sqrt 2 5 10

Hey there! :D

So, basically, you could say that "x" is equal to both of the legs. 

We also know that in 45-45-90 triangles, x*√2= the hypotenuse

Given this information, if we were to divide 10 by the √2, we would get:

10/√2= 7.071 

5√2= 7.071

5√2 is the answer. 

I hope this helps!
~kaikers