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The Surface Area of a Sphere

Why is it the same as the curved strip which surrounds it?

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Grab a perfect sphere. Enclose it in a tube of paper (Figure 1). I claim that the rectangular sheet required to make the tube has the same area as the surface of the sphere.

How can this be?




Maths is like finger-painting. Messy and beautiful.

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Adam Hrankowski, ADHD

Adam Hrankowski, ADHD

Canadian math guy, experimenting with fiction. Find my new scifi/fantasy serial here:

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