# Mathematician:Theodorus of Cyrene

## Mathematician

Ancient Libyan Greek mathematician best known for the mathematical theorem now known as the Spiral of Theodorus.

Taught mathematics to Plato.

Proved that the square roots of the natural numbers from $3$ to $17$, except for $4$, $9$ and $16$, are irrational.

Known about only from the works of Plato.

Libyan Greek

## History

• Born: 465 BC in Cyrene (now Shahhat, Libya)
• Died: 398 BC in Cyrene (now Shahhat, Libya)