Students will be able to find the unions and
intersections of sets.
Algebra 1 Foundations, pg 230
Students will be able to find the unions and
intersections of sets.
Certain regions of the Venn diagram in the Solve It show
unions and intersections of sets.
Focus Question
What are the union and intersection of sets?
The union of two or more sets is the set that contains all of
the elements of the sets. The intersection of two or more
sets is the set of elements that are common to every set.
Algebra 1 Foundations, pg 230
Students will be able to find the unions and
intersections of sets.
To find the union of two sets, list the elements that are in
either set, or both sets. An element is in the union if it
belongs to at least one of the sets. In the Venn diagram
below, A U B is shaded.
Algebra 1 Foundations, pg 230
Students will be able to find the unions and
intersections of sets.
Algebra 1 Foundations, pg 231
Students will be able to find the unions and
intersections of sets.
P = { 0, 1, 2, 3, 4 }
Therefore,
Q = { 2, 4 }
P U Q = { 0, 1, 2, 3, 4 }
U
If B A, then A U B will contain the same
elements as A.
Algebra 1 Foundations, pg 231
Students will be able to find the unions and
intersections of sets.
An element is in the intersection if it belongs to all of the
sets. When you find the intersection of two sets, list only
the elements that are in both sets. In the Venn Diagram
below, A ∩ B is shaded.
Algebra 1 Foundations, pg 231
Students will be able to find the unions and
intersections of sets.
Disjoint sets have no elements in common. The
intersection of disjoint sets is the empty set. The diagram
below shows two disjoint sets.
Algebra 1 Foundations, pg 231
Students will be able to find the unions and
intersections of sets.
Algebra 1 Foundations, pg 232
Students will be able to find the unions and
intersections of sets.
A ∩ B = { 2, 8 }
A∩C=0
C ∩ B = { 5, 7 }
Algebra 1 Foundations, pg 232
Students will be able to find the unions and
intersections of sets.
You can draw Venn diagrams to solve problems involving
relationships between sets.
Algebra 1 Foundations, pg 232
Students will be able to find the unions and
intersections of sets.
You can also use Venn diagrams to show the number of
elements in the union or intersection of sets.
Algebra 1 Foundations, pg 233
Students will be able to find the unions and
intersections of sets.
Algebra 1 Foundations, pg 233
Students will be able to find the unions and
intersections of sets.
U
= subset
∩ = intersection
U = union
Algebra 1 Foundations, pg 234
Students will be able to find the unions and
intersections of sets.
U
= subset
∩ = intersection
U = union
Algebra 1 Foundations, pg 234