Question 1081124
I am making the assumption that for purposes of this problem, the goal post will be at the 0 yard line (this is not likely true in most stadiums).
We know the distance to the 50 yard line is 50 yards.  That is adjacent to the angle.  The height is opposite to the angle.
The angle is 72 degrees, and the tangent 72=opposite/adjacent=opposite/50
height is 50 tan 72 or 153.88 yards.
If the goal post were 10 yards back, this would make it higher, since 60 would be used rather than 50.