The fourth root of 256 is 4:
19x2-9x2= 10x2
16x-13x= 3x
45-23= 22
(10x2+3x+22)
Since we aren't told the length of the 3rd bar, focus solely on the lengths of the first 2 bars. Add together their lengths: 1.15 cm + 3.92 cm = 5.07 cm.
The area is 80 I may not be completely right but that is what I got
I hope this helps