Summary worksheets for grade 7 mathematics

Use Venn diagram to represent sets, subsets and set operations

Objectives:

a. Describe universal set and subsets.
b. Use Venn Diagram to represent sets and subsets and set operations.
c. Appreciate the importance of representing things in everyday life through Venn
diagrams.




The universal set, or simply the universe, denoted by U, contains all the
elements being considered in a given situation.

What are Venn diagrams?

Pictorial representations of sets represented by closed figures are called set
diagrams or Venn diagrams.

Venn diagrams are used to show relationships between sets and to illustrate
various operations like union, intersection and difference.

We can express the relationship among sets through this in a more significant
way.

In this,
A rectangle is used to represent a universal set.
Circles or ovals are used to represent other subsets of the universal set.

This shows that every element
of A is in the universal set




Venn diagrams in different situations

If a set A is a subset of set B, then the circle representing set A is drawn inside
the circle representing set B.