Some venn diagrams have 2 circles inside a rectangle and are very simple. Here is a venn diagram with 3 intersecting circles.

The Venn diagram shows 2 intersecting circles, one labeled Africa 93 and the other labeled Asia 155. The area of intersection is labeled 70. Funding for this project is provided by the National ...

A graphic technique for visualizing set theory concepts using overlapping circles and shading to indicate ... the late 1800s by English logician, John Venn, although it is believed that the ...