Answer:
[tex] \dfrac{7\sqrt{2}}{2} [/tex]
Step-by-step explanation:
Since the legs are congruent, the triangle is 45-45-90 right triangle.
The ratio of the lengths of the sides is
1:1:√2
x = 7/√2
Now we rationalize the denominator.
x = 7/√2 × √2/√2 = 7√2/2
