Today we will be learning to make and describe 2-D shapes.

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Presentation transcript:

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

ShapeNumber of sides Number of vertices 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.