Math Monday: Skewer Hyperboloid
FEBRUARY 8, 2010

by George Hart



hyperboloid-standing
Thirty two shish-kabob skewers and 176 small rubber bands are all it takes to make a beautiful hyperbolid of revolution. This is an example of what is called a “ruled surface” meaning even though it is curved, it is made of straight lines.
hyperboloid-axial-view
Here is the same object seen from the top.  Make one of your own following the instructions here, but don’t skewer yourself!


This article first appeared on Make: Online, February 8, 2010.

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