Euler's polyhedron formula
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enA fly walks round a football
http://plus.maths.org/content/fly-walks-round-football
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Ken Bray </div>
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<p>What makes a perfect football? Anyone who plays or simply watches the game could quickly list the qualities. The ball must be round, retain its shape, be bouncy but not too lively and, most importantly, be capable of impressive speeds. We find out that this last point is all down to the ball's surface, the most prized research goal in ball design.</p>
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What makes a perfect football? Anyone who plays or simply watches the game could quickly list the qualities. The ball must be perfectly round and retain its shape and internal pressure after a lot of physical abuse. It should be bouncy, but not too lively when kicked or headed and it must not absorb water. And finally it should move about in a pacey manner when passed between the players and be capable of impressive turns of speed for shots at goal.
</p><p><a href="http://plus.maths.org/content/fly-walks-round-football" target="_blank">read more</a></p>http://plus.maths.org/content/fly-walks-round-football#commentsaerodynamicsdragEuler's polyhedron formulafootballmathematics in sportolympicsThu, 15 Sep 2011 19:15:14 +0000Rachel5537 at http://plus.maths.org/contentEuler's polyhedron formula
http://plus.maths.org/content/eulers-polyhedron-formula
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Abigail Kirk </div>
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Leonhard Euler, the most prolific mathematician of all time, would have celebrated his 300th birthday this year. In this article, the second in a four-part series on Euler and his work, <b>Abigail Kirk</b> explores one of the formulae that carry his name. </div>
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<div class="pub_date">June 2007</div>
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<p>Leonhard Euler, 1707 - 1783</p>
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<p>Let's begin by introducing the protagonist of this story — Euler's formula:</p><p><a href="http://plus.maths.org/content/eulers-polyhedron-formula" target="_blank">read more</a></p>http://plus.maths.org/content/eulers-polyhedron-formula#comments43EulerEuler characteristicEuler yearEuler's polyhedron formulageometryplatonic solidThu, 31 May 2007 23:00:00 +0000plusadmin2308 at http://plus.maths.org/content