# Limaçon of Pascal

## Description

A limaçon is a bicircular rational plane algebraic curve of degree 4. Limaçon of Pascal, is defined as a roulette formed when a circle rolls around the outside of a circle of equal radius. It can also be defined as the roulette formed when a circle rolls around a circle with half its radius so that the smaller circle is inside the larger circle. The Limaçon equation in Cartesian coordinates has a form, using the radii of both circles.

Related formulas## Variables

x | X-coordinate (m) |

y | Y-Coordinate (m) |

a | Radius of the main circle (m) |

b | Radius of the rolling circle (m) |