Question

What's a ven diagram

Answer 1

Well , it is a diagram and that diagram is named Venn : )

A Venn diagram is an illustration that uses circles to show the relationships among things or finite groups of things. Circles that overlap have a commonality while circles that do not overlap do not share those traits. Venn diagrams help to visually represent the similarities and differences between two concepts.

Mostly used for set theory of mathematics.