Answer:
[tex]FJ=35\ units[/tex]
Step-by-step explanation:
we know that
If two triangles are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
In this problem
Triangles FEG and FHJ are similar by AA Similarity Theorem
see the attached figure to better understand the problem
so
[tex]\frac{FJ}{FG}=\frac{FH}{FE}[/tex]
we have
[tex]FG=50\ units\\FH=28\ units\\FE=HF+EH=28+12=40\ units[/tex]
substitute
[tex]\frac{FJ}{50}=\frac{28}{40}[/tex]
[tex]FJ=\frac{28}{40}(50)[/tex]
[tex]FJ=35\ units[/tex]