Trying to Trisect a Triangle

Angle Trisection -- from Wolfram MathWorld

A geometric proof of the impossibility of angle trisection by

Angle Trisection

Angle trisection

Geometry - How to trisect a line

Bisecting and Trisecting Segments - dummies

How to Trisect and Bisect any angle, All In One Sujay

Trisecting a Line Segment

Trisection of an Angle Logic, Astronomy, Science, and Ideas Too

Trying to Trisect a Triangle

Approximate Angle Trisection – GeoGebra

Elementary Plane Geometry - 7 Trisect a right angle

Trisecting the Angle

Angle trisection - Wikipedia