bmwhype2 wrote:
A regular pentagon is inscribed in a circle. If A and B are adjacent vertices of the pentagon and O is the center of the circle, what is the value of ∠OAB ?
A. 48 degrees
B. 54 degrees
C. 72 degrees
D. 84 degrees
E. 108 degrees
∠0AB=(180-360/5)/2=54°
B