

A deltoid (or tricuspid) is the locus of a point on the circumference of a circle rolling inside another circle with a radius three times larger in ma...



This curve is defined geometrically as the conchoid of a circle of radius a, with respect to a point O on the circumference of a circle.



The lemniscate of Bernoulli, also known as the hyperbolic lemniscate, is defined as the inverse of an equilateral hyperbola.



The eight curve, also called the lemniscate of Gerono, is named for its appearance as a sideways 8.



The conchoid of Nicomedes, also known as the cochloid, is the conchoid of a line with respect to a point not on the line.



The Kappa Curve, or Gutschoven's curve, was studied by Gérard van Gutschoven around 1662.



The Bicorn is the locus of the equations shown below.



The Bowditch curve is the locus of the equations shown below.



