c. 380-c. 320 B.C.

Greek Mathematician

In the course of trying to solve the problem of doubling the cube, Menaechmus discovered the conic sections, which would have an enormous impact on mathematics in modern times. He was also responsible for distinguishing between the two meanings of the word element, which up to that point had caused confusion among Greek geometers.

Whereas historians know almost nothing about the life of Dinostratus (c. 390-c. 320 B.C.), who applied the quadratix of Hippias (c. 460-c. 400 B.C.) in an attempt to square the circle, information about Menaechmus is much more readily available—a salient point, since he was the younger brother of Dinostratus. Nonetheless, his family life is otherwise a mystery, as are the facts of his birth.

Various writers have provided details on Menaechmus's career, allowing a historian to piece together a picture of sorts. There was a Menaechmus, from...