Today we will be learning
how to sort shapes using Venn and
Carroll diagrams.
Mental Activity
We are going to look at some 2-D
shapes.
We will work out the number of sides
and corners they have.
What is the total of the sides of a
triangle plus the corners of a square?
3+4=
7
Multiply the number of sides of a
hexagon by the number of sides of a
pentagon.
6x5=
30
How many sides do 2 pentagons and 2
octagons have altogether?
5 + 5 + 8 + 8 = 26
How many vertices do 6 rectangles have?
6 x 4 = 24
How many right angles do 5 squares have
altogether?
5 x 4 = 20
How many sides do 3 parallelograms
have?
3 x 4 = 12
Main Activity
Today we will sort objects
using Venn diagrams and Carroll diagrams.
Here is a Carroll diagram.
straight sides
Where
should
each
shape
go?
not straight sides
four
sides
not
four
sides
Here is a Carroll diagram.
straight sides
Where
will you
put the
square?
not straight sides
four
sides
not
four
sides
Here is a Carroll diagram.
straight sides
not straight sides
four
sides
What
about
the
trapezium?
not
four
sides
Here is a Carroll diagram.
straight sides
not straight sides
four
sides
And
the
hexagon?
not
four
sides
Here is a Carroll diagram.
straight sides
What
about
this
one?
not straight sides
four
sides
not
four
sides
Here is a Carroll diagram.
straight sides
not straight sides
four
sides
And
this
one?
not
four
sides
Here is a Carroll diagram.
straight sides
not straight sides
four
sides
Where
will you
put the
last
shape?
not
four
sides
Can you see how the Carroll diagram
works?
straight sides
not straight sides
four
sides
not
four
sides
Can you remember what a Venn diagram is?
four sides
straight
sides
We will use these groups.
Sort these shapes using the Venn
diagram.
four sides
straight
sides
Where will the square go?
four sides
straight
sides
Why must the square go here?
What about the hexagon?
four sides
straight
sides
Where should we put the triangle?
four sides
straight
sides
Where should the trapezium go?
four sides
straight
sides
What about this four-sided shape?
four sides
straight
sides
Where should we put the moon?
four sides
straight
sides
Can you see how the Venn diagram
works?
four sides
straight
sides
Group Work
Sort shapes using either a Carroll
or a Venn diagram.
Sort shapes using either a Carroll
or a Venn diagram.
Draw Venn diagrams using the
information on Carroll diagrams.