Answer:
x = 6[tex]\sqrt{2}[/tex] = 8.485
Step-by-step explanation:
In a 45-45-90 triangle, the hypotenuse is [tex]\sqrt{2}[/tex] times the length of a leg.
So, if you are given the hypotenuse, then divide its length by [tex]\sqrt{2}[/tex]
x = 12/[tex]\sqrt{2}[/tex] = 12[tex]\sqrt{2}[/tex]/2 = 6[tex]\sqrt{2}[/tex] = 8.485
