33. 3-D Shapes Talk About


A 3-D shape is a shape with three dimensions: length, width and height.


This is a square, which is a 2-D shape.


This is a cube, which is a 3-D shape.


Can you see the difference? How would you describe the difference?


When you watch a movie in 3-D, objects look quite realistic because they appear to have three dimensions (3-D), rather than seeming to be fl at.


Let’s begin by seeing if we can remember the names of the 3-D shapes we learned about in 2nd class. Discuss and label the shapes below.


1.


a)


b) l


c) r P i


d)


2. Can you remember the names of our two new 3-D shapes? a) This is a Tri n


b) Name something that is this shape: 3. a) This is a P r m d b) Name something in the world that is this shape: Strand: Shape and Space 200


Curriculum Objectives: Identify, describe and classify 3-D shapes, including cube, cuboid, cylinder, cone, sphere, triangular prism and pyramid;


explore, describe and compare the properties of 3-D shapes;


explore and describe the relationship of 3-D shapes with constituent 2-D shapes;


construct 3-D shapes; solve and complete practical tasks and problems involving 2-D and 3-D shapes.


e)


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