Answer:
I believe it would be D.
Step-by-step explanation:
F.
20=4*5
9=4+5
6
a=1
b=81
c=9
let remaining angle in heptagon be a.
a+64=180(linear pair)
a=116
again
x+155+90+163+a+121°=720(sum of interior angle of hexagon is (6-2)×180°)
x+529+a=720
x+116=720-529
x=191-116=75
