In a right triangle with an angle of 45 degrees, the sides opposite the 45-degree angles are equal, and the hypotenuse can be calculated using the relationship between the side lengths.
For a right triangle where one side (the side opposite the 45-degree angle) is \( x \), the hypotenuse \( h \) can be found using the formula:
\[ h = x\sqrt{2} \]
In the second right triangle, the side opposite the 45-degree angle has a length of 14. Therefore, we can calculate the hypotenuse:
\[ h = 14\sqrt{2} \]
Thus, the length of the hypotenuse in the second triangle is \( 14\sqrt{2} \).
Now, verifying against the provided multiple choice responses, the correct answer is:
The hypotenuse of the second triangle has length \( 14\sqrt{2} \).