Rads and Revs: Quick Conceptual Insight

There are 2 π's in a full revolution.
There are 4 π/2 's in a full revolution.
There are 6 π/3 's in a full revolution.
There are 8 π/4 's in a full revolution.
There are 12 π/6 's in a full revolution.
– Tim Brzezinski

Information: Rads and Revs: Quick Conceptual Insight