alleryWhich curve did Hippias use in the fifth century BCE to trisect an angle?
AThe circle
BThe ellipse
CThe parabola
DThe quadratrix
Answer & Solution
Correct answer: D. The quadratrix
1. Hippias used a curve called the quadratrix.
2. It trisected the general angle and also squared the circle.
3. Such a curve cannot be drawn with only a straightedge and compass.
_Source: Wikipedia, Straightedge and compass construction, section History_
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