A Venn Diagram has 3 parts. There are two sections that are used for the differences. The middle section is used for the similarities.
A venn diagram is used to compare and contrast two different ideas. To make a Venn Diagrm, you draw two circles which overlap. Each circle represents one of the topics you are comparing and contrasting. For example, one circle would represent apples and the other oranges. The overlapping section of the circles is for listing the similarities. In our example, one might find the words fruit, seeds, trees, Halloween, etc. The circle labaled apple might have the words red and green. The circle labeled orange might contain the words orange and sections.