Hello from MrBillDoesMath!
Answer:
30 degrees
Discussion:
Imagine a bug walking on a circle one time. The bug covers 360 degrees or 2 Pi radians. So
360 degrees = 2 Pi radians => divide both sides by 12
360/12 degrees = (2/12) Pi radians => 360/12 = 30 and 2/12 = 1/6
30 degrees = Pi/6 radians
Thank you,
MrB