Question

what is point?
A unicellular cannot seen by naked eye then also they have measure in mm. but why called point is dot having no length breadth and area?​

Answer 1

In modern mathematics, a point refers usually to an element of some set called a space. More specifically, in Euclidean geometry, a point is a primitive notion upon which the geometry is built, meaning that a point cannot be defined in terms of previously defined objects.