👉 Cassinian is a mathematical concept in geometry that refers to the relationship between a line and a circle. The cassinian of two points A and B on a circle with center O, where O is the midpoint of AB, is defined as: \[ \text{cassinian} = \frac{|OA| + |OB| - |AB|}{2} \] This formula states that the length of the cassinian (the distance between two points) is equal to the
