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Today we will be learning
to make and describe 2-D shapes.
Mental Activity
Can you identify these mystery shapes?
Can you guess what this shape is?
What about now?
Equilateral triangle
Can you guess this one?
What about now?
Here’s another clue.
Regular pentagon
Can you guess this one?
What about now?
Here’s another clue.
Square
Main Activity
Today we are going to revise and extend our work on 2-D shapes.
What do we call any plane (2-D) shape with 3 sides?
A triangle
What do we call any plane (2-D) shape with 4 sides?
A quadrilateral
What do we call any plane (2-D) shape with 5 sides?
A pentagon
What do we call any plane (2-D) shape with 6 sides?
A hexagon
How many vertices does a shape with 4 sides have?
4
How many vertices does a shape with 3 sides have?
3
Shape Number of sides
Number of vertices
3 3
4 4
5 5
6 6
Can you see a pattern?
Look at this table.
The number of sides and the number of vertices are equal.
Is this true for all 2-D shapes?
Why?
Group Work
Make and name shapes.
Draw and label regular and irregular 2-D shapes.
Draw and label regular and irregular 2-D shapes with their lines of symmetry.