Answer:
15
Step-by-step explanation:
15 x 2 = 30
Tan x = 8749/675
x= arctan (8749/675) arctan = tan^-1
x=85.59 degrees
Slope of AB = 1/3 and slope of BC = -3 so these 2 lines are perpendicular
The same is true for all the other adjjacent pairs of lines.
Oppoitse lines are also paralllel ( slope of AB = 1/3 and slope of DC = 1/3) and other pair are both of slope -3.
So Its C