tennis ball theorem
... that the tennis ball theorem concerns curves that, like the seam of a tennis ball, cut the surface of a sphere into two equal areas?
... that the <b id="mwAm8"><a href="./Tennis_ball_theorem" id="mwAnA" rel="mw:WikiLink" title="Tennis ball theorem">tennis ball theorem</a></b> concerns curves that, like the seam of a <a href="./Tennis_ball" id="mwAnE" rel="mw:WikiLink" title="Tennis ball">tennis ball</a>, cut the surface of a sphere into two equal areas?