Answer: 918km^2
Step-by-step explanation:

Let x be the new dimension of the area;


Answer:
slope: undefined
Step-by-step explanation:
vertical line slope = (y-y') / (x-x')
x-x' = 0
slope: undefined
AB is reflected across the line Y=x
6+2s-8s=18
6-6s=18
-6s= 18-6
-6s= 12
S= 12/-6
S= -2
Hope this helps!