If u need defination of supplementary angle then it is like this,
THOSE ANGLE WHICH IS EXACTLY 189 DEGREE IS CALLED SUPPLEMENTARY ANGLE.
AEB = CED = 180 - 45 - 14 = 121 deg
EDC = 180 - 121 - 27 = 32 deg
So angle D is 32 degrees
X=3 and y=1 are the horizontal and vertical asymptotes of this function