#geometry 

A **limacon** is a curve defined by the following [[Полярная система координат|polar equation]]:
$$\LARGE r=a\pm b\cos{\theta}$$
OR 
$$\LARGE r=a\pm b\sin{\theta}$$
![[Pasted image 20240917180702.png]]


If $\LARGE a=b$, then it is a [[Cardioid|cardioid]]