a folded paper lantern
... that a folded paper lantern shows that certain mathematical definitions of surface area are incorrect?
... that <b id="mwMQ"><a href="./Schwarz_lantern" id="mwMg" rel="mw:WikiLink" title="Schwarz lantern">a folded paper lantern</a></b> shows that certain mathematical definitions of <a href="./Surface_area" id="mwMw" rel="mw:WikiLink" title="Surface area">surface area</a> are incorrect?