Archimedes discovered that if you add the volume of a cone and a sphere you get the volume of their bounding cylinder.
https://media.mathstodon.xyz/media_attachments/files/113/379/849/518/848/292/original/f07e0389fc7ba115.jpg
Archimedes discovered that if you add the volume of a cone and a sphere you get the volume of their bounding cylinder.
A truly beautiful result.
[Image credit: https://mathigon.org/]
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