Venn Diagram Definition:

A picture of sets.
Sets = circles
Rectangle = Universal set

Set Definition:

Recall our lesson on sets
A collection of things.
Examples include letters, numbers, fruits.

Set Intersection.

Intersection of A and B is A ∩ B
A ∩ B means everthing in both A and B:
Segment

Set Union

Union of A and B is A U B
A U B means everything in A or B
Segment

Complement of a set:

AC or A' means everything in U not in A.
Segment