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Limaçon

A famliy of related curves usually expressed in polar coordinates. The cardioid is a special kind of limaçon.

 

Limaçon:   r = b + a cos θ (horizontal, pictured below)  or  r = b + a sin θ (vertical)

convex

Note: If a = b the curve is a cardioid.

 

See also

Convex, polar curves

 


  this page updated 27-aug-12
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes