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What's a Venn Diagram, and How Do You Find the Intersection and Union of a Set?

Definition: Venn Diagram

Summary

  1. The circles A and B represent sets
  2. "Intersect" is represented by an upside down U
  3. The intersection is where the circles overlap
  4. "Union" is represented by a right-side up U
  5. The union is the entire area of both circles

Notes

    1. The intersection is all the elements A and B have in common
    1. Where the circles intersect is the intersection!
    1. Any element that is in either A or B is also in their union
    1. The union is everything in either A, B, or their intersection