# Mathematician:Adriaan Metius

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## Mathematician

Dutch geometer and astronomer.

Best known now for his approximation $\dfrac {355} {113}$ for $\pi$ (pi), known to the Chinese and Arabic mathematical traditions centuries earlier.

## Nationality

Dutch

## History

- Born: 9 December 1571 in Alkmaar
- Died: 6 September 1635 in Franeker

## Theorems

- Metius' Number, also known as the Zu Chongzhi Fraction

Definitions of concepts named for **Adriaan Metius** can be found here.

## Publications

- 1611:
*Arithmeticæ et Geometriæ Practica* *Institutiones Astronomicae Geographicae*- 1640:
*Arithmeticæ libri duo: et geometriæ libri VI*

## Also known as

**Adriaan Metius** was born **Adriaan Adriaanszoon**, the surname being a patronym.

The name **Metius** derives from the Dutch word **meten** (meaning **measuring**), and therefore means something like **measurer** or **surveyor**.

Some sources give his first name as **Adriaen**.