Trisecting the Angle/Historical Note

Historical Note on Trisecting the Angle
The exercise to trisect of the general angle using a compass and straightedge construction, was an exercise that the ancient Greeks failed to succeed in.

This was one of three such problems: the other two being Squaring the Circle and Doubling the Cube.

There are several techniques available that use other tools, but these were considered unacceptably vulgar to the followers of.