The <a href="https://en.wikipedia.org/wiki/Circle_packing_in_a_square" class="extiw" title="w:Circle packing in a square">densest packing</a> of six equal circles in a square. Python code to generate this packing available <a rel="nofollow" class="external text" href="https://gist.github.com/Parclytaxel/b921932f357e73dafa0d91d915e80a7d">here</a>.
<a href="//commons.wikimedia.org/wiki/User:Parcly_Taxel" title="User:Parcly Taxel">Parcly Taxel</a>
FAL
<span class="int-own-work" lang="en">Own work</span>