Statics - Final Exam problem 3 (truss)

Thermodynamics: drive.google.c...
Mechanics of Materials: drive.google.c...
Statics: drive.google.c...
Dynamics: drive.google.c...

[@sos9854]

Hi my teacher i am from Saudi arabia and my English language very weak .. can you explain why did you put (2/3 (4)) in minutes 9:19 thanks.

[@engineeringdeciphered]

That is the height from point I to E. That would be the moment arm for the x component of that force at I