Answer:
x=15√2
Step-by-step explanation:
15²+15²=c²
225+225=c²
450=c²
√450=c
√9x25x2=c
√9x√25x√2=c
3x5x√2=c
15√2=c
(Or you could use the 45-45-90 rule for triangles to get the same thing).
