How to trisect angles with Marked ruler and compass?

1 Background 0:25 2 Method to trisect angle by Archimedes 2:35 3 Demo in practice 4:44 3 Geo Interpretation on impossibility with unmarked straightedge 6:52 Reference: "A geometric proof of the impossibility of angle trisection by straightedge and compass" by Terrence Tao https://terrytao.wordpress.com/2011/0... Don't forget to subscribe if you like the videos! If you would like ask me any question, join the chat on Discord:   / discord