Definition of Central Angle
A circle is divided into 4 congruent sectors and then each of them is divided into 3 congruent sectors as in the figure. What is the measure of the central angle POQ in degrees?
Correct Answer: D
Step 1: Central angle of each sector = (360/12)° = 30°
Step 2: Measure of the central angle POQ is 2(30) = 60.