Answer:
n = 52
Explanation:
the given triangle is an isoceles triangle as one angle is of 90 degrees, the other two of 45 degrees each. 
 the sides congruent to congruent angles I. e (45 degrees) are also congruent. 
therefore one side is given I. e 52 
so the other side being congruent will also be congruent. 
therefore n = 52 units