Answer:
18.4
Explanation:
13² + 13² = x²
169 + 169 = x²
338 = x²
x = 18.38477....
a² + b² = c²
13² + 13² = c²
169 + 169 = c²
338 = c²
c = √338 or 18.385 or 13√2
5.6m questions
7.3m answers