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QUADRATRIX

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