
Why?
We have the isosceles right triangle. The length of legs are 6. Use the Pythagorean theorem:

In general, the formula for calculating the hypotenuse in an isosceles right triangle is 
a - a leg, h - a hypotenuse
If my math is correct B or C is what it comes down to
Answer:
1.8
Step-by-step explanation:
3.6/ x for x =2
3.6/2 = 1.8