I'm assuming the question looks like this?

If so then the answer should be:

Hope this helps!
Just do a line crossing another in a angle of 90°
1 is linear pair with 2, 2 is linear pair with 3, 3 is linear pair with 4 and 4 is linear pair with 1.
Answer:
F(x)= (x+1) (x+12) or A
Step-by-step explanation:
( x + 1 ) ( x + 12 )
x^2 + 1x + 12x + 12
x^2 + 13x + 12