In the diagram, angle 20o is subtended at the centre of the circle, find the value of x
A.
30o
B.
50o
C.
80o
D.
100o
Correct answer is B
2(30 + x) = 360 - 200
60 + 2x = 160
2x = 160 - 60
2x = 100
x = \(\frac{100}{2}\)
x = 50