Answer:
80
Step-by-step explanation:
If there is any cyclic quadrilateral, which is a quadrilateral inscribed inside a circle, there is one simple property that is
the opposite angles add upto 180.
Thus we can say
96 + c = 180
and
d + 100 = 180
Since we need d, we use 2nd equation:
d + 100 = 180
d = 180 - 100
d = 80
