Determine the forces in members BC and FG of the loaded symmetrical truss. Show that this calculation can be accomplished by using one section and two equations, each of which contains only one of the two unknowns.
Use 1160 N instead of 1200 N, 460N instead of 800 N, and 1020 N instead of 400 N.
Also use DK and KE as 2.9 m instead of 2 m and the side lengths EF, FG, and GH as 3.5 m instead of 2 m.