Venn Diagrams babay

This week we learned about Venn diagrams. The concept is one of the simplest things we have learned this year. You need to remember several formulas for each diagram. I will be going over six of them.

First of all, an upside down U means intersection.

A right side up U means union

A letter with a line over it means compliment.

When drawing your diagram, it is helpful to put the total number beneath it. DO NOT PUT THIS NUMBER INSIDE. Make sure to put a U in the top left corner of the diagram.

EXAMPLE



a) (A η B)=5
This means the intersection of A and B which is the middle part of the diagram.

b) (A U B)=25
This means the union of A and B which is everything in the diagram.

c) Ā=57
This is everything that does not have A in it. Therefore it is B and the surrounding area or “neithers”.

d) A=18
This simply means all A. You add what is JUST A and the middle since it is made up of A and B.

e) B=12
All things B therefore just B and the middle section.

f) Ḃ (pretend it’s a line and not a dot)=63
This would be everything that isn’t B therefore A and the surrounding area.

These would be six basic problems relating to Venn diagrams.

--Sarah(: