In the diagram, O is the center of the circle, If ∠POQ = 80o and ∠PRQ = 5x, find the value of x.
A.
4o
B.
8o
C.
16o
D.
20o
E.
32o
Correct answer is B
80o = 2 x 5x(angle at the center)
=80o = 10x; x = 80o/10
= 8o