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</html><thumbnail_url>https://blogs.futura-sciences.com/lehning/wp-content/uploads/sites/13/2018/10/Indiana-StateSeal.png</thumbnail_url><thumbnail_width>724</thumbnail_width><thumbnail_height>724</thumbnail_height><description>En 1897, une r&#xE9;solution &#xE9;tablissant que &#x3C0;&#xA0;=&#xA0;4 fut propos&#xE9;e au vote des repr&#xE9;sentants de l&#x2019;&#xE9;tat de l&#x2019;Indiana (&#xC9;tats-Unis d&#x2019;Am&#xE9;rique). Avant de sourire, le math&#xE9;maticien se posera une question&#xA0;: pour quelle notion de distance&#xA0;? Qu&#x2019;est-ce que &#x3C0; ? Archim&#xE8;de a r&#xE9;pondu &#xE0; cette question voici fort longtemps. Il s&#x2019;agit du rapport entre la circonf&#xE9;rence d&#x2019;un cercle &hellip; Continuer la lecture de  &rarr;</description></oembed>
