Why are manhole covers round? - Marc Chamberland
Published April 13, 2015
Views 656K | Likes 12.6K | Comments 372
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View full lesson: http://ed.ted.com/lessons/why-are-manhole-covers-round-marc-chamberland Why are most manhole covers round? Sure it makes them easy to roll, and slide into place in any alignment. But there’s another, more compelling reason, involving a peculiar geometric property of circles and other shapes. Marc Cha…
- Published
- April 13, 2015
- Made for kids
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