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Rotating a line in 3D gives a... hyperbola?
Author:
Michael Borcherds
Topic:
Hyperbola
GeoGebra
Rotate a line about the z-axis and trace the intersection with the plane y=0 Original animated GIF here which is even more cool!
twitter.com/DrTrapezio/status/700787251723112448
gifbin.com/988980
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