did you find the answers :( ??
Answer:
The answer is t/3=20
The right diagram is the one that has the orange boxes with 20s and has a t on top
We can name an angle either by naming its vertex or by three letters , keeping the letter of vertex in between.
so here vertex is F
we can name it as ∠EFG, ∠F , ∠GFE
This strikes out the option B that is ∠G
so option B is the answer