Reuleaux Triangle See the Pen <a href="https://codepen.io/firegroove/pen/eYoYNrm/f1b4c0765c779d94c2755c1e98bc5e94"> Un trou carré / Square Hole (Reuleaux)</a> by Firegroove (<a href="https://codepen.io/firegroove">@firegroove</a>) on <a href="https://codepen.io">CodePen</a>.
