![Fermat's Library on X: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35 Fermat's Library on X: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35](https://pbs.twimg.com/media/Dg3CuQlVQAAQH1j.jpg)
Fermat's Library on X: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35
![Ludolf Van Ceulen, Vanden Circkel (Delft 1596), con un ritratto di Ludolf Van Ceulen all'età di 56 anni. Ludolf van Ceulen, Vanden Circkel (Delft 1596). Busto di Ludolf Van Ceulen (Hildesheim, 28 Ludolf Van Ceulen, Vanden Circkel (Delft 1596), con un ritratto di Ludolf Van Ceulen all'età di 56 anni. Ludolf van Ceulen, Vanden Circkel (Delft 1596). Busto di Ludolf Van Ceulen (Hildesheim, 28](https://c8.alamy.com/compit/2g13862/ludolf-van-ceulen-vanden-circkel-delft-1596-con-un-ritratto-di-ludolf-van-ceulen-all-eta-di-56-anni-ludolf-van-ceulen-vanden-circkel-delft-1596-busto-di-ludolf-van-ceulen-hildesheim-28-gennaio-1540-leiden-31-dicembre-1610-all-eta-di-56-anni-con-collare-allentato-ovale-con-periferico-catturato-in-lista-ornamentale-con-rollerwork-e-armi-sotto-il-ritratto-un-immagine-di-un-cerchio-con-una-descrizione-del-numero-pi-sotto-lo-spettacolo-una-didascalia-olandese-a-quattro-righe-per-stampare-i-dati-di-stampa-in-letterpress-van-ceulen-era-un-fencer-e-matematico-divenne-secondo-meursius-2g13862.jpg)
Ludolf Van Ceulen, Vanden Circkel (Delft 1596), con un ritratto di Ludolf Van Ceulen all'età di 56 anni. Ludolf van Ceulen, Vanden Circkel (Delft 1596). Busto di Ludolf Van Ceulen (Hildesheim, 28
![Fermat's Library on X: "π is sometimes called Ludolph's constant for Ludolph van Ceulen (1540–1610), who spent many years computing π to 35 places https://t.co/xmOGOqMwsJ" / X Fermat's Library on X: "π is sometimes called Ludolph's constant for Ludolph van Ceulen (1540–1610), who spent many years computing π to 35 places https://t.co/xmOGOqMwsJ" / X](https://pbs.twimg.com/media/D3eJARSXsAA8B1P.jpg)