Answer:
6(n−1)=2(2n+4)
6n−6=2(2n+4)
6n−6=4n+8
6n−6+6=4n+8+6
6n=4n+14.
6n−4n=4n+14−4n
2n=14
Divided by 2
n = 7
50° is the answer since the the circumscribed angle is 1/2 of the arc on the opp side
3 1/3 x 5 = 16 2/3
AREA OF A PARALLELOGRAM:
L x W