Answer:
11
Explanation:
if the two triangles are similar, that means that they are proportional to each other.
If you look at how they are shaped, they look the same, just one is smaller.
When you compare the two, you see that on triangle EFU, side EU corresponds with side VU on triangle VWU
EU = 7 and VU = 35
now divide so see what the multiplying factor is
35/7 = 5
so, when you divide the values on triangle VWU by 5, you get the values for triangle EFU
35/5 = 7
side UW corresponds with side UF
UW = 55 and UF = ?
55/5 = 11
Side UF = 11