Answer:
EG=5
Explanation:
Congruent means equal to in math so since it is equal to the other triangle it must be the same in some way
and with the 90-degree angle, it shows you where it is pointing
with angle B=F
E=A
G=C
the lines connecting them are also equal
AB=EF
BC=FG
EG=AC
Since AC=5
threrfore EG also equals 5