Answer:
Explanation:
First we can determine that this is a special 45-45-90 triangle, since the two legs are congruent, meaning the two unknown angles are congruent as well:
180 = 90 + 2(theta)
theta = 45
Knowing this, we can remember that the hypotenuse of this special triangle is equal to the leg*sqrt(2).
This means that 1 = x(sqrt(2)).

Hope this helps!