alleryWhich ancient mathematician showed that a marked straightedge can trisect any angle?
AEuclid
BArchimedes
CPythagoras
DThales
Answer & Solution
Correct answer: B. Archimedes
1. Archimedes used a neusis construction.
2. It needs a straightedge with two marks on it.
3. That tool is outside the classical rules, so the impossibility proof still stands.
_Source: Wikipedia, Straightedge and compass construction, section Angle trisection_
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