Question

In a plane line B is parallel to line F, line F is parallel to line G, and line H is perpendicular to line B, which can not be true

Answer 1

Answer with explanation:

It is given that , in a Plane

→  Line B ║ Line F

→  Line G ║ Line F

Two lines parallel to the same line are parallel to each other.

⇒ Line G ║ Line F ║Line B

If there are two or more parallel lines in a plane, and a line is perpendicular to either any of the parallel lines, then that line is perpendicular to all the parallel lines.

→Also,it is given that,  Line H  ⊥  Line B.

∴Line H  ⊥  Line F.

∴Line H  ⊥  Line G.

⇒Line H can not be parallel to , line G or line F.

Answer 2

I believe line H. It can't only be perpendicular to line B. It would have to be perpendicular to all three lines. Hope this helped. :)