A Venn diagram in math can show how various sets of numerical data overlap with one another. For example, if one circle represents every number between 1 and 25 and another represents every number ...

A true Venn shows all possible overlaps between sets. 1. Venn Diagram. This one can be an introduction, but it's far too simplistic. There are plenty of diagrams that feature circles but are not Venn.

Learn how to draw and interpret Venn diagrams with this BBC Bitesize Maths article. For students between the ages of 11 and 14.