A quadratrix is a curve that can be used to solve the problem of squaring the circle, that is to say, constructing by using a ruler and a compass the length p when the unit length is given. Of course, this construction assumes that the curve is already traced, and since the number p is transcendental, its tracing cannot be a ruler-and-compass construction.
Examples:
    - the Abdank-Abakanowicz quadratrix
    - the Dinostrate quadratrix
    - the involute of a circle
    - the Archimedean spiral.
 

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© Robert FERRÉOL 2017