unbalanced, balanced and split-balanced variants of <a href="https://en.wikipedia.org/wiki/%CE%A0_pad" class="extiw" title="en:Π pad">pi-pads</a>
<a href="//commons.wikimedia.org/wiki/User:Constant314" title="User:Constant314">Constant314</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Constant314" title="User talk:Constant314">talk</a><span style="white-space:nowrap"> <b>·</b></span> <a href="//commons.wikimedia.org/wiki/Special:Contributions/Constant314" title="Special:Contributions/Constant314">contribs</a>)
2010-12-17
<span class="int-own-work" lang="en">Own work</span>