The discussion revolves around the impossibility of trisecting an arbitrary angle using only a compass and straightedge, with references to specific angles where trisection may be possible. Participants seek resources and proofs related to this geometric problem.
Participants express differing views on the conditions under which angle trisection is possible, indicating that there is no consensus on the general applicability of the impossibility proof.
The discussion does not resolve the mathematical steps involved in the proof of angle trisection impossibility, nor does it clarify the implications of allowing markings on the straightedge.
murshid_islam said:i have read that it has been proven that an angle cannot be trisected using just a compass and a straight-edge (unless it is some specific angle, e.g., 90 degrees or 180 degrees). can anyone tell me where i can find the proof? can anyone suggest any website?