Dinostratus (389–319 BCE)

Born 389 BCE, died 319 BCE.

Dinostratus (Greek: Δεινόστρατος; c. 390 – c. 320 BCE) was a Greek mathematician and geometer, and the brother of Menaechmus. He is known for using the quadratrix to solve the problem of squaring the circle.

Text from the Wikipedia article Dinostratus, licensed CC BY-SA 4.0.

Everything else in 389 BCE

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