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Clay Mathematics Institute 50 years of tetra brik in Spain

is celebrating 50 years of use in Spain this is so common, everyday object. Few have noticed the relation of mathematics with his name and some of those who have not been made clear from where.

If we now observe any of the cartons of our house we can see that its shape is that of a parallelepiped, nothing to do with a tetrahedron that would seem, in view of his name logical form. Originally
the container itself was shaped like a tetrahedron but storage problems resulted in its current form. You can enjoy this picture of TETRA PAK in which appreciates its origin (XL Semanal Image No. 1203)