Introduction to 3D Figures

3D Shapes Intro

Let's take a journey...get a piece of paper and a pencil to being (white board will also work)

Draw a dot

Dots exist in no dimension...

Why doesn't this dot have any dimension?

Draw another dot and connect it with a line

Now you have entered the 1st dimension

Why is this line 1 dimensional?

Draw another dot and connect it to the line

You have entered the 2nd dimension

Why is this triangle 2 dimensional?

Draw another dot and connect it to the points of the triangle

Now you have entered the 3rd dimension!

Why is this triangular pyramid 3 dimensional?

3d shapes are 3 dimensional because they have 3 dimensions

Height

Width

Length

Open Ended

What are some 3D shapes that you already know?

Multiple Choice

What is the blue shape called?

• Cube

• Sphere

• Cone

• Cylinder

• Triangular Prism

Multiple Choice

What is the red shape called?

• Cube

• Sphere

• Cone

• Cylinder

• Triangular Prism

Multiple Choice

What is the yellow shape called?

• Cube

• Sphere

• Pyramid

• Hexagonal Prism

• Triangular Prism

Multiple Choice

What is the gray shape called?

• Triangle

• Sphere

• Pyramid

• Hexagonal Prism

• Cylinder

Multiple Choice

What is the green shape called?

• Triangle

• Sphere

• Pyramid

• Cone

• Cylinder

Let's take a closer look at some different 3D shapes...

What do you notice about this image? What do you wonder?

3D shapes have bases..

Take a closer look --->

Multiple Choice

What is a base?

• The top face of a 3D object

• The funny face of a 3D object

• The bottom face of a 3D object

• The left face of a 3D object

Multiple Choice

What is the shape of the base?

• Triangle

• Square

• Circle

• Hexagon

Multiple Choice

What is the shape of the base?

• Triangle

• Square

• Circle

• Hexagon

Multiple Choice

What is the shape of the base?

• Pentagon

• Square

• Decagon

• Hexagon

A certain type of 3D shape has an apex

Let's take a closer look --->

These types of shapes are pyramids

Pyramids have only 1 base and 1 apex

you can tell pyramids apart by looking at their base --->

For example, a triangular pyramid has a triangular base

Multiple Choice

Is this shape a pyramid?

• No, because it doesn't have a base

• No, because it doesn't have an apex

• Yes, because it has a base

• Yes, because it has an apex

Multiple Choice

Is this shape a pyramid?

• Yes, because it only has 1 base and 1 apex

• Yes, because it has at least 1 base

• No, because it doesn't have an apex

• No, because it doesn't have 2 bases

What about shapes without an apex?

Shapes with no apex and 2 bases are called prisms. Take a look ---->

They also get their name from the shape of their base.

Multiple Choice

Which type of 3D shape has an apex?

• Pyramids

• Prisms

• Hexagons

• Cylinders

Multiple Choice

Which type of 3D shape has 2 bases and NO apex?

• Pyramid

• Prisms

• Hexagons

• Cones

Multiple Choice

Name this shape.

• Triangular Prism

• Triangular Pyramid

• Triangular Triangle

• Triangle

Multiple Choice

Name this shape.

• Triangular Triangle

• Triangular Prism

• Triangular Triangle

• Triangular Pyramid

Open Ended

Name at least one difference between pyramids and prisms.