Torsion measures how sharply a curve is twisting. It is analagous to curvature. If given a vector-valued function r(t), the torsion at a given value of t is
((r' × r")· r(3) ) ||r' × r"||-2.
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According to the United States Census Bureau, the town has a total area of 5.8 km² (2.2 mi²). 5.4 km² (2.1 mi²) of it is ...